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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Cash flows from operating activities: |  |  |
Net (loss) income |  | $ (5,201,021) | $ 5,261,411
Adjustments to reconcile net (loss) income to net cash used in operating activities |  |  |
Stock-based compensation |  | 939,711 | 932,743
Depreciation and amortization | [1] | 1,141,161 | 867,277
Deferred income tax benefit |  | (495,228) | 831,148
Provision for inventory obsolescence |  | 135,819 | 606,856
Provision for bad debts |  | 24,000 | 2,000
Increase (decrease) in operating assets |  |  |
Accounts receivable |  | (2,030,603) | (1,453,094)
Contract assets |  | 7,039,227 | (5,800,506)
Inventories |  | 967,931 | (260,940)
Other current assets |  | (555,779) | 68,112
Increase (decrease) in operating liabilities |  |  |
Accounts payable |  | (461,774) | 431,836
Accrued expenses |  | (1,235,064) | 795,552
Contract liabilities |  | 70,211 | (4,796,025)
Deferred revenue |  | 167,946 | 134,133
Total adjustments |  | 5,707,558 | (7,640,908)
Net cash provided (used in) by operating activities |  | 506,537 | (2,379,497)
Cash flows from investing activities: |  |  |
Capital expenditures |  | (2,537,652) | (889,298)
Purchase of building |  |  | (14,000,886)
Purchase of MesoScribe Technologies |  |  | (419,813)
Other assets |  | 3,264 | (10,503)
Net cash (used in) investing activities |  | (2,534,388) | (15,320,500)
Cash flows from financing activities |  |  |
Current maturities of long-term debt |  | 110,266 |
Net proceeds from stock options exercised |  |  | 146,220
Proceeds from mortgage payable |  |  | 10,387,500
Payments of long-term debt |  | (853,963) | (300,000)
Net cash (used in) provided by financing activities |  | (743,697) | 10,233,720
Net decrease in cash and cash equivalents |  | (2,771,548) | (7,466,277)
Cash and cash equivalents at beginning of year |  | 14,210,909 | 21,677,186
Cash and cash equivalents at end of year |  | 11,439,361 | 14,210,909
Supplemental disclosure of cash flow information: |  |  |
Income taxes paid |  | 472,542 | 601,800
Interest paid |  | $ 463,850 | $ 71,263
[1] | Includes amortization expense of $115,800 and $45,645 for the year ending December 31, 2018 and the year ended December 31, 2017, respectively. Such amortization expense relates to other capitalized and intangibles assets.

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- Definition Amount of cash inflow (outflow) from long-term debt supported by a written promise to pay an obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24072-122690 + Details
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- Definition Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109197908&loc=SL79508275-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=82913815&loc=SL49130534-203044 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 + Details
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- References No definition available. + Details
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