<SEC-DOCUMENT>0001084991-22-000128-index.html : 20221215
<SEC-HEADER>0001084991-22-000128.hdr.sgml : 20221215
<ACCEPTANCE-DATETIME>20221215163158
ACCESSION NUMBER:		0001084991-22-000128
CONFORMED SUBMISSION TYPE:	8-K
PUBLIC DOCUMENT COUNT:		197
CONFORMED PERIOD OF REPORT:	20221212
ITEM INFORMATION:		Entry into a Material Definitive Agreement
ITEM INFORMATION:		Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant
ITEM INFORMATION:		Financial Statements and Exhibits
FILED AS OF DATE:		20221215
DATE AS OF CHANGE:		20221215

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NATURAL GAS SERVICES GROUP INC
		CENTRAL INDEX KEY:			0001084991
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL, GAS FIELD SERVICES, NBC [1389]
		IRS NUMBER:				752811855
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		8-K
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-31398
		FILM NUMBER:		221465226

	BUSINESS ADDRESS:	
		STREET 1:		404 VETERANS AIRPARK LANE
		STREET 2:		SUITE 300
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79705
		BUSINESS PHONE:		(432) 262-2700

	MAIL ADDRESS:	
		STREET 1:		404 VETERANS AIRPARK LANE
		STREET 2:		SUITE 300
		CITY:			MIDLAND
		STATE:			TX
		ZIP:			79705
</SEC-HEADER>
<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>ngs-20221212.htm
<DESCRIPTION>8-K
<TEXT>
Document 1 - file: ngs-20221212.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-10.1 <SEQUENCE>2 <FILENAME>firstamendmenttocreditag.htm <DESCRIPTION>EX-10.1 FIRST AMENDMENT TO CREDIT AGREEMENT DATED DECEMBER 12, 2022 <TEXT> Document 2 - file: firstamendmenttocreditag.htm
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.SCH <SEQUENCE>3 <FILENAME>ngs-20221212.xsd <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT <TEXT> Document 3 - file: ngs-20221212.xsd
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.LAB <SEQUENCE>4 <FILENAME>ngs-20221212_lab.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT <TEXT> Document 4 - file: ngs-20221212_lab.xml
</DOCUMENT> <DOCUMENT> <TYPE>EX-101.PRE <SEQUENCE>5 <FILENAME>ngs-20221212_pre.xml <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT <TEXT> Document 5 - file: ngs-20221212_pre.xml
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>6 <FILENAME>firstamendmenttocreditag001.jpg <TEXT> Document 6 - file: firstamendmenttocreditag001.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>7 <FILENAME>firstamendmenttocreditag002.jpg <TEXT> Document 7 - file: firstamendmenttocreditag002.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>8 <FILENAME>firstamendmenttocreditag003.jpg <TEXT> Document 8 - file: firstamendmenttocreditag003.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>9 <FILENAME>firstamendmenttocreditag004.jpg <TEXT> Document 9 - file: firstamendmenttocreditag004.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>10 <FILENAME>firstamendmenttocreditag005.jpg <TEXT> Document 10 - file: firstamendmenttocreditag005.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>11 <FILENAME>firstamendmenttocreditag006.jpg <TEXT> Document 11 - file: firstamendmenttocreditag006.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>12 <FILENAME>firstamendmenttocreditag007.jpg <TEXT> Document 12 - file: firstamendmenttocreditag007.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>13 <FILENAME>firstamendmenttocreditag008.jpg <TEXT> Document 13 - file: firstamendmenttocreditag008.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>14 <FILENAME>firstamendmenttocreditag009.jpg <TEXT> Document 14 - file: firstamendmenttocreditag009.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>15 <FILENAME>firstamendmenttocreditag010.jpg <TEXT> Document 15 - file: firstamendmenttocreditag010.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>16 <FILENAME>firstamendmenttocreditag011.jpg <TEXT> Document 16 - file: firstamendmenttocreditag011.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>17 <FILENAME>firstamendmenttocreditag012.jpg <TEXT> Document 17 - file: firstamendmenttocreditag012.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>18 <FILENAME>firstamendmenttocreditag013.jpg <TEXT> Document 18 - file: firstamendmenttocreditag013.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>19 <FILENAME>firstamendmenttocreditag014.jpg <TEXT> Document 19 - file: firstamendmenttocreditag014.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>20 <FILENAME>firstamendmenttocreditag015.jpg <TEXT> Document 20 - file: firstamendmenttocreditag015.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>21 <FILENAME>firstamendmenttocreditag016.jpg <TEXT> Document 21 - file: firstamendmenttocreditag016.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>22 <FILENAME>firstamendmenttocreditag017.jpg <TEXT> Document 22 - file: firstamendmenttocreditag017.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>23 <FILENAME>firstamendmenttocreditag018.jpg <TEXT> Document 23 - file: firstamendmenttocreditag018.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>24 <FILENAME>firstamendmenttocreditag019.jpg <TEXT> Document 24 - file: firstamendmenttocreditag019.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>25 <FILENAME>firstamendmenttocreditag020.jpg <TEXT> Document 25 - file: firstamendmenttocreditag020.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>26 <FILENAME>firstamendmenttocreditag021.jpg <TEXT> Document 26 - file: firstamendmenttocreditag021.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>27 <FILENAME>firstamendmenttocreditag022.jpg <TEXT> Document 27 - file: firstamendmenttocreditag022.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>28 <FILENAME>firstamendmenttocreditag023.jpg <TEXT> Document 28 - file: firstamendmenttocreditag023.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>29 <FILENAME>firstamendmenttocreditag024.jpg <TEXT> Document 29 - file: firstamendmenttocreditag024.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>30 <FILENAME>firstamendmenttocreditag025.jpg <TEXT> Document 30 - file: firstamendmenttocreditag025.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>31 <FILENAME>firstamendmenttocreditag026.jpg <TEXT> Document 31 - file: firstamendmenttocreditag026.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>32 <FILENAME>firstamendmenttocreditag027.jpg <TEXT> Document 32 - file: firstamendmenttocreditag027.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>33 <FILENAME>firstamendmenttocreditag028.jpg <TEXT> Document 33 - file: firstamendmenttocreditag028.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>34 <FILENAME>firstamendmenttocreditag029.jpg <TEXT> Document 34 - file: firstamendmenttocreditag029.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>35 <FILENAME>firstamendmenttocreditag030.jpg <TEXT> Document 35 - file: firstamendmenttocreditag030.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>36 <FILENAME>firstamendmenttocreditag031.jpg <TEXT> Document 36 - file: firstamendmenttocreditag031.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>37 <FILENAME>firstamendmenttocreditag032.jpg <TEXT> Document 37 - file: firstamendmenttocreditag032.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>38 <FILENAME>firstamendmenttocreditag033.jpg <TEXT> Document 38 - file: firstamendmenttocreditag033.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>39 <FILENAME>firstamendmenttocreditag034.jpg <TEXT> Document 39 - file: firstamendmenttocreditag034.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>40 <FILENAME>firstamendmenttocreditag035.jpg <TEXT> Document 40 - file: firstamendmenttocreditag035.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>41 <FILENAME>firstamendmenttocreditag036.jpg <TEXT> Document 41 - file: firstamendmenttocreditag036.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>42 <FILENAME>firstamendmenttocreditag037.jpg <TEXT> Document 42 - file: firstamendmenttocreditag037.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>43 <FILENAME>firstamendmenttocreditag038.jpg <TEXT> Document 43 - file: firstamendmenttocreditag038.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>44 <FILENAME>firstamendmenttocreditag039.jpg <TEXT> Document 44 - file: firstamendmenttocreditag039.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>45 <FILENAME>firstamendmenttocreditag040.jpg <TEXT> Document 45 - file: firstamendmenttocreditag040.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>46 <FILENAME>firstamendmenttocreditag041.jpg <TEXT> Document 46 - file: firstamendmenttocreditag041.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>47 <FILENAME>firstamendmenttocreditag042.jpg <TEXT> Document 47 - file: firstamendmenttocreditag042.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>48 <FILENAME>firstamendmenttocreditag043.jpg <TEXT> Document 48 - file: firstamendmenttocreditag043.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>49 <FILENAME>firstamendmenttocreditag044.jpg <TEXT> Document 49 - file: firstamendmenttocreditag044.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>50 <FILENAME>firstamendmenttocreditag045.jpg <TEXT> Document 50 - file: firstamendmenttocreditag045.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>51 <FILENAME>firstamendmenttocreditag046.jpg <TEXT> Document 51 - file: firstamendmenttocreditag046.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>52 <FILENAME>firstamendmenttocreditag047.jpg <TEXT> Document 52 - file: firstamendmenttocreditag047.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>53 <FILENAME>firstamendmenttocreditag048.jpg <TEXT> Document 53 - file: firstamendmenttocreditag048.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>54 <FILENAME>firstamendmenttocreditag049.jpg <TEXT> Document 54 - file: firstamendmenttocreditag049.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>55 <FILENAME>firstamendmenttocreditag050.jpg <TEXT> Document 55 - file: firstamendmenttocreditag050.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>56 <FILENAME>firstamendmenttocreditag051.jpg <TEXT> Document 56 - file: firstamendmenttocreditag051.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>57 <FILENAME>firstamendmenttocreditag052.jpg <TEXT> Document 57 - file: firstamendmenttocreditag052.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>58 <FILENAME>firstamendmenttocreditag053.jpg <TEXT> Document 58 - file: firstamendmenttocreditag053.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>59 <FILENAME>firstamendmenttocreditag054.jpg <TEXT> Document 59 - file: firstamendmenttocreditag054.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>60 <FILENAME>firstamendmenttocreditag055.jpg <TEXT> Document 60 - file: firstamendmenttocreditag055.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>61 <FILENAME>firstamendmenttocreditag056.jpg <TEXT> Document 61 - file: firstamendmenttocreditag056.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>62 <FILENAME>firstamendmenttocreditag057.jpg <TEXT> Document 62 - file: firstamendmenttocreditag057.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>63 <FILENAME>firstamendmenttocreditag058.jpg <TEXT> Document 63 - file: firstamendmenttocreditag058.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>64 <FILENAME>firstamendmenttocreditag059.jpg <TEXT> Document 64 - file: firstamendmenttocreditag059.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>65 <FILENAME>firstamendmenttocreditag060.jpg <TEXT> Document 65 - file: firstamendmenttocreditag060.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>66 <FILENAME>firstamendmenttocreditag061.jpg <TEXT> Document 66 - file: firstamendmenttocreditag061.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>67 <FILENAME>firstamendmenttocreditag062.jpg <TEXT> Document 67 - file: firstamendmenttocreditag062.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>68 <FILENAME>firstamendmenttocreditag063.jpg <TEXT> Document 68 - file: firstamendmenttocreditag063.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>69 <FILENAME>firstamendmenttocreditag064.jpg <TEXT> Document 69 - file: firstamendmenttocreditag064.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>70 <FILENAME>firstamendmenttocreditag065.jpg <TEXT> Document 70 - file: firstamendmenttocreditag065.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>71 <FILENAME>firstamendmenttocreditag066.jpg <TEXT> Document 71 - file: firstamendmenttocreditag066.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>72 <FILENAME>firstamendmenttocreditag067.jpg <TEXT> Document 72 - file: firstamendmenttocreditag067.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>73 <FILENAME>firstamendmenttocreditag068.jpg <TEXT> Document 73 - file: firstamendmenttocreditag068.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>74 <FILENAME>firstamendmenttocreditag069.jpg <TEXT> Document 74 - file: firstamendmenttocreditag069.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>75 <FILENAME>firstamendmenttocreditag070.jpg <TEXT> Document 75 - file: firstamendmenttocreditag070.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>76 <FILENAME>firstamendmenttocreditag071.jpg <TEXT> Document 76 - file: firstamendmenttocreditag071.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>77 <FILENAME>firstamendmenttocreditag072.jpg <TEXT> Document 77 - file: firstamendmenttocreditag072.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>78 <FILENAME>firstamendmenttocreditag073.jpg <TEXT> Document 78 - file: firstamendmenttocreditag073.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>79 <FILENAME>firstamendmenttocreditag074.jpg <TEXT> Document 79 - file: firstamendmenttocreditag074.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>80 <FILENAME>firstamendmenttocreditag075.jpg <TEXT> Document 80 - file: firstamendmenttocreditag075.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>81 <FILENAME>firstamendmenttocreditag076.jpg <TEXT> Document 81 - file: firstamendmenttocreditag076.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>82 <FILENAME>firstamendmenttocreditag077.jpg <TEXT> Document 82 - file: firstamendmenttocreditag077.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>83 <FILENAME>firstamendmenttocreditag078.jpg <TEXT> Document 83 - file: firstamendmenttocreditag078.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>84 <FILENAME>firstamendmenttocreditag079.jpg <TEXT> Document 84 - file: firstamendmenttocreditag079.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>85 <FILENAME>firstamendmenttocreditag080.jpg <TEXT> Document 85 - file: firstamendmenttocreditag080.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>86 <FILENAME>firstamendmenttocreditag081.jpg <TEXT> Document 86 - file: firstamendmenttocreditag081.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>87 <FILENAME>firstamendmenttocreditag082.jpg <TEXT> Document 87 - file: firstamendmenttocreditag082.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>88 <FILENAME>firstamendmenttocreditag083.jpg <TEXT> Document 88 - file: firstamendmenttocreditag083.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>89 <FILENAME>firstamendmenttocreditag084.jpg <TEXT> Document 89 - file: firstamendmenttocreditag084.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>90 <FILENAME>firstamendmenttocreditag085.jpg <TEXT> Document 90 - file: firstamendmenttocreditag085.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>91 <FILENAME>firstamendmenttocreditag086.jpg <TEXT> Document 91 - file: firstamendmenttocreditag086.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>92 <FILENAME>firstamendmenttocreditag087.jpg <TEXT> Document 92 - file: firstamendmenttocreditag087.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>93 <FILENAME>firstamendmenttocreditag088.jpg <TEXT> Document 93 - file: firstamendmenttocreditag088.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>94 <FILENAME>firstamendmenttocreditag089.jpg <TEXT> Document 94 - file: firstamendmenttocreditag089.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>95 <FILENAME>firstamendmenttocreditag090.jpg <TEXT> Document 95 - file: firstamendmenttocreditag090.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>96 <FILENAME>firstamendmenttocreditag091.jpg <TEXT> Document 96 - file: firstamendmenttocreditag091.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>97 <FILENAME>firstamendmenttocreditag092.jpg <TEXT> Document 97 - file: firstamendmenttocreditag092.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>98 <FILENAME>firstamendmenttocreditag093.jpg <TEXT> Document 98 - file: firstamendmenttocreditag093.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>99 <FILENAME>firstamendmenttocreditag094.jpg <TEXT> Document 99 - file: firstamendmenttocreditag094.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>100 <FILENAME>firstamendmenttocreditag095.jpg <TEXT> Document 100 - file: firstamendmenttocreditag095.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>101 <FILENAME>firstamendmenttocreditag096.jpg <TEXT> Document 101 - file: firstamendmenttocreditag096.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>102 <FILENAME>firstamendmenttocreditag097.jpg <TEXT> Document 102 - file: firstamendmenttocreditag097.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>103 <FILENAME>firstamendmenttocreditag098.jpg <TEXT> Document 103 - file: firstamendmenttocreditag098.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>104 <FILENAME>firstamendmenttocreditag099.jpg <TEXT> Document 104 - file: firstamendmenttocreditag099.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>105 <FILENAME>firstamendmenttocreditag100.jpg <TEXT> Document 105 - file: firstamendmenttocreditag100.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>106 <FILENAME>firstamendmenttocreditag101.jpg <TEXT> Document 106 - file: firstamendmenttocreditag101.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>107 <FILENAME>firstamendmenttocreditag102.jpg <TEXT> Document 107 - file: firstamendmenttocreditag102.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>108 <FILENAME>firstamendmenttocreditag103.jpg <TEXT> Document 108 - file: firstamendmenttocreditag103.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>109 <FILENAME>firstamendmenttocreditag104.jpg <TEXT> Document 109 - file: firstamendmenttocreditag104.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>110 <FILENAME>firstamendmenttocreditag105.jpg <TEXT> Document 110 - file: firstamendmenttocreditag105.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>111 <FILENAME>firstamendmenttocreditag106.jpg <TEXT> Document 111 - file: firstamendmenttocreditag106.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>112 <FILENAME>firstamendmenttocreditag107.jpg <TEXT> Document 112 - file: firstamendmenttocreditag107.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>113 <FILENAME>firstamendmenttocreditag108.jpg <TEXT> Document 113 - file: firstamendmenttocreditag108.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>114 <FILENAME>firstamendmenttocreditag109.jpg <TEXT> Document 114 - file: firstamendmenttocreditag109.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>115 <FILENAME>firstamendmenttocreditag110.jpg <TEXT> Document 115 - file: firstamendmenttocreditag110.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>116 <FILENAME>firstamendmenttocreditag111.jpg <TEXT> Document 116 - file: firstamendmenttocreditag111.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>117 <FILENAME>firstamendmenttocreditag112.jpg <TEXT> Document 117 - file: firstamendmenttocreditag112.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>118 <FILENAME>firstamendmenttocreditag113.jpg <TEXT> Document 118 - file: firstamendmenttocreditag113.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>119 <FILENAME>firstamendmenttocreditag114.jpg <TEXT> Document 119 - file: firstamendmenttocreditag114.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>120 <FILENAME>firstamendmenttocreditag115.jpg <TEXT> Document 120 - file: firstamendmenttocreditag115.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>121 <FILENAME>firstamendmenttocreditag116.jpg <TEXT> Document 121 - file: firstamendmenttocreditag116.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>122 <FILENAME>firstamendmenttocreditag117.jpg <TEXT> Document 122 - file: firstamendmenttocreditag117.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>123 <FILENAME>firstamendmenttocreditag118.jpg <TEXT> Document 123 - file: firstamendmenttocreditag118.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>124 <FILENAME>firstamendmenttocreditag119.jpg <TEXT> Document 124 - file: firstamendmenttocreditag119.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>125 <FILENAME>firstamendmenttocreditag120.jpg <TEXT> Document 125 - file: firstamendmenttocreditag120.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>126 <FILENAME>firstamendmenttocreditag121.jpg <TEXT> Document 126 - file: firstamendmenttocreditag121.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>127 <FILENAME>firstamendmenttocreditag122.jpg <TEXT> Document 127 - file: firstamendmenttocreditag122.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>128 <FILENAME>firstamendmenttocreditag123.jpg <TEXT> Document 128 - file: firstamendmenttocreditag123.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>129 <FILENAME>firstamendmenttocreditag124.jpg <TEXT> Document 129 - file: firstamendmenttocreditag124.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>130 <FILENAME>firstamendmenttocreditag125.jpg <TEXT> Document 130 - file: firstamendmenttocreditag125.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>131 <FILENAME>firstamendmenttocreditag126.jpg <TEXT> Document 131 - file: firstamendmenttocreditag126.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>132 <FILENAME>firstamendmenttocreditag127.jpg <TEXT> Document 132 - file: firstamendmenttocreditag127.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>133 <FILENAME>firstamendmenttocreditag128.jpg <TEXT> Document 133 - file: firstamendmenttocreditag128.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>134 <FILENAME>firstamendmenttocreditag129.jpg <TEXT> Document 134 - file: firstamendmenttocreditag129.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>135 <FILENAME>firstamendmenttocreditag130.jpg <TEXT> Document 135 - file: firstamendmenttocreditag130.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>136 <FILENAME>firstamendmenttocreditag131.jpg <TEXT> Document 136 - file: firstamendmenttocreditag131.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>137 <FILENAME>firstamendmenttocreditag132.jpg <TEXT> Document 137 - file: firstamendmenttocreditag132.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>138 <FILENAME>firstamendmenttocreditag133.jpg <TEXT> Document 138 - file: firstamendmenttocreditag133.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>139 <FILENAME>firstamendmenttocreditag134.jpg <TEXT> Document 139 - file: firstamendmenttocreditag134.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>140 <FILENAME>firstamendmenttocreditag135.jpg <TEXT> Document 140 - file: firstamendmenttocreditag135.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>141 <FILENAME>firstamendmenttocreditag136.jpg <TEXT> Document 141 - file: firstamendmenttocreditag136.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>142 <FILENAME>firstamendmenttocreditag137.jpg <TEXT> Document 142 - file: firstamendmenttocreditag137.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>143 <FILENAME>firstamendmenttocreditag138.jpg <TEXT> Document 143 - file: firstamendmenttocreditag138.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>144 <FILENAME>firstamendmenttocreditag139.jpg <TEXT> Document 144 - file: firstamendmenttocreditag139.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>145 <FILENAME>firstamendmenttocreditag140.jpg <TEXT> Document 145 - file: firstamendmenttocreditag140.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>146 <FILENAME>firstamendmenttocreditag141.jpg <TEXT> Document 146 - file: firstamendmenttocreditag141.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>147 <FILENAME>firstamendmenttocreditag142.jpg <TEXT> Document 147 - file: firstamendmenttocreditag142.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>148 <FILENAME>firstamendmenttocreditag143.jpg <TEXT> Document 148 - file: firstamendmenttocreditag143.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>149 <FILENAME>firstamendmenttocreditag144.jpg <TEXT> Document 149 - file: firstamendmenttocreditag144.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>150 <FILENAME>firstamendmenttocreditag145.jpg <TEXT> Document 150 - file: firstamendmenttocreditag145.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>151 <FILENAME>firstamendmenttocreditag146.jpg <TEXT> Document 151 - file: firstamendmenttocreditag146.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>152 <FILENAME>firstamendmenttocreditag147.jpg <TEXT> Document 152 - file: firstamendmenttocreditag147.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>153 <FILENAME>firstamendmenttocreditag148.jpg <TEXT> Document 153 - file: firstamendmenttocreditag148.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>154 <FILENAME>firstamendmenttocreditag149.jpg <TEXT> Document 154 - file: firstamendmenttocreditag149.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>155 <FILENAME>firstamendmenttocreditag150.jpg <TEXT> Document 155 - file: firstamendmenttocreditag150.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>156 <FILENAME>firstamendmenttocreditag151.jpg <TEXT> Document 156 - file: firstamendmenttocreditag151.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>157 <FILENAME>firstamendmenttocreditag152.jpg <TEXT> Document 157 - file: firstamendmenttocreditag152.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>158 <FILENAME>firstamendmenttocreditag153.jpg <TEXT> Document 158 - file: firstamendmenttocreditag153.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>159 <FILENAME>firstamendmenttocreditag154.jpg <TEXT> Document 159 - file: firstamendmenttocreditag154.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>160 <FILENAME>firstamendmenttocreditag155.jpg <TEXT> Document 160 - file: firstamendmenttocreditag155.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>161 <FILENAME>firstamendmenttocreditag156.jpg <TEXT> Document 161 - file: firstamendmenttocreditag156.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>162 <FILENAME>firstamendmenttocreditag157.jpg <TEXT> Document 162 - file: firstamendmenttocreditag157.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>163 <FILENAME>firstamendmenttocreditag158.jpg <TEXT> Document 163 - file: firstamendmenttocreditag158.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>164 <FILENAME>firstamendmenttocreditag159.jpg <TEXT> Document 164 - file: firstamendmenttocreditag159.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>165 <FILENAME>firstamendmenttocreditag160.jpg <TEXT> Document 165 - file: firstamendmenttocreditag160.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>166 <FILENAME>firstamendmenttocreditag161.jpg <TEXT> Document 166 - file: firstamendmenttocreditag161.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>167 <FILENAME>firstamendmenttocreditag162.jpg <TEXT> Document 167 - file: firstamendmenttocreditag162.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>168 <FILENAME>firstamendmenttocreditag163.jpg <TEXT> Document 168 - file: firstamendmenttocreditag163.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>169 <FILENAME>firstamendmenttocreditag164.jpg <TEXT> Document 169 - file: firstamendmenttocreditag164.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>170 <FILENAME>firstamendmenttocreditag165.jpg <TEXT> Document 170 - file: firstamendmenttocreditag165.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>171 <FILENAME>firstamendmenttocreditag166.jpg <TEXT> Document 171 - file: firstamendmenttocreditag166.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>172 <FILENAME>firstamendmenttocreditag167.jpg <TEXT> Document 172 - file: firstamendmenttocreditag167.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>173 <FILENAME>firstamendmenttocreditag168.jpg <TEXT> Document 173 - file: firstamendmenttocreditag168.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>174 <FILENAME>firstamendmenttocreditag169.jpg <TEXT> Document 174 - file: firstamendmenttocreditag169.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>175 <FILENAME>firstamendmenttocreditag170.jpg <TEXT> Document 175 - file: firstamendmenttocreditag170.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>176 <FILENAME>firstamendmenttocreditag171.jpg <TEXT> Document 176 - file: firstamendmenttocreditag171.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>177 <FILENAME>firstamendmenttocreditag172.jpg <TEXT> Document 177 - file: firstamendmenttocreditag172.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>178 <FILENAME>firstamendmenttocreditag173.jpg <TEXT> Document 178 - file: firstamendmenttocreditag173.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>179 <FILENAME>firstamendmenttocreditag174.jpg <TEXT> Document 179 - file: firstamendmenttocreditag174.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>180 <FILENAME>firstamendmenttocreditag175.jpg <TEXT> Document 180 - file: firstamendmenttocreditag175.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>181 <FILENAME>firstamendmenttocreditag176.jpg <TEXT> Document 181 - file: firstamendmenttocreditag176.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>182 <FILENAME>firstamendmenttocreditag177.jpg <TEXT> Document 182 - file: firstamendmenttocreditag177.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>183 <FILENAME>firstamendmenttocreditag178.jpg <TEXT> Document 183 - file: firstamendmenttocreditag178.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>184 <FILENAME>firstamendmenttocreditag179.jpg <TEXT> Document 184 - file: firstamendmenttocreditag179.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>185 <FILENAME>firstamendmenttocreditag180.jpg <TEXT> Document 185 - file: firstamendmenttocreditag180.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>186 <FILENAME>firstamendmenttocreditag181.jpg <TEXT> Document 186 - file: firstamendmenttocreditag181.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>187 <FILENAME>firstamendmenttocreditag182.jpg <TEXT> Document 187 - file: firstamendmenttocreditag182.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>188 <FILENAME>firstamendmenttocreditag183.jpg <TEXT> Document 188 - file: firstamendmenttocreditag183.jpg
</DOCUMENT> <DOCUMENT> <TYPE>GRAPHIC <SEQUENCE>189 <FILENAME>firstamendmenttocreditag184.jpg <TEXT> Document 189 - file: firstamendmenttocreditag184.jpg
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>190 <FILENAME>R1.htm <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 190 - file: R1.htm
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>191 <FILENAME>ngs-20221212_htm.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 191 - file: ngs-20221212_htm.html
Document 191 - RAW XML: ngs-20221212_htm.xml
</DOCUMENT> <DOCUMENT> <TYPE>EXCEL <SEQUENCE>192 <FILENAME>Financial_Report.xlsx <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 192 - file: Financial_Report.xlsx
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>193 <FILENAME>Show.js <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 193 - file: Show.js
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>194 <FILENAME>report.css <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 194 - file: report.css
</DOCUMENT> <DOCUMENT> <TYPE>XML <SEQUENCE>195 <FILENAME>FilingSummary.xml <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 195 - file: FilingSummary.html
Document 195 - RAW XML: FilingSummary.xml
</DOCUMENT> <DOCUMENT> <TYPE>JSON <SEQUENCE>197 <FILENAME>MetaLinks.json <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 197 - file: MetaLinks.json
</DOCUMENT> <DOCUMENT> <TYPE>ZIP <SEQUENCE>198 <FILENAME>0001084991-22-000128-xbrl.zip <DESCRIPTION>IDEA: XBRL DOCUMENT <TEXT> Document 198 - file: 0001084991-22-000128-xbrl.zip
</DOCUMENT> </SEC-DOCUMENT>