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INCOME TAXES (Tables) | 12 Months Ended
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Dec. 31, 2015
INCOME TAXES |
Schedule of income tax expense |
|  | 2015 |  | 2014 |
Current taxes—Federal |  | $ | (297,000 | ) | $ | (106,000 | )
Current taxes—State |  |  | 6,000 |  |  | 39,000 |
Current taxes—Foreign |  |  | 29,000 |  |  | 51,000 |
Deferred taxes—Federal |  |  | (107,000 | ) |  | 137,000 |
Deferred taxes—State |  |  | 53,000 |  |  | (40,000 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income tax (benefit) expense |  | $ | (316,000 | ) | $ | 81,000 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of statutory rate reconciliation |
|  | 2015 |  | 2014 |
Statutory federal tax provision |  | $ | (302,000 | ) | $ | 327,000 |
State income taxes |  |  | 3,000 |  |  | 45,000 |
Effect of foreign operations |  |  | (5,000 | ) |  | (9,000 | )
Uncertain tax positions |  |  | (3,000 | ) |  | (88,000 | )
Income tax credits |  |  | (125,000 | ) |  | (215,000 | )
Valuation allowance |  |  | 86,000 |  |  | — |
Permanent differences |  |  | 30,000 |  |  | 21,000 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Income tax (benefit) expense |  | $ | (316,000 | ) | $ | 81,000 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of income from operations before income taxes |
|  | 2015 |  | 2014 |
Domestic |  | $ | (968,793 | ) | $ | 816,840 |
Foreign |  |  | 81,371 |  |  | 144,177 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total |  | $ | (887,422 | ) | $ | 961,017 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of deferred tax assets (liabilities) |
|  | 2015 |  | 2014 |
Allowance for uncollectable accounts |  | $ | 115,000 |  | $ | 50,000 |
Inventories reserve |  |  | 270,000 |  |  | 267,000 |
Accrued vacation |  |  | 360,000 |  |  | 334,000 |
Non-compete amortization |  |  | 191,000 |  |  | 222,000 |
Stock-based compensation and equity appreciation rights |  |  | 111,000 |  |  | 148,000 |
State Tax NOL |  |  | 113,000 |  |  | 95,000 |
Tax credit carryforwards |  |  | 231,000 |  |  | 73,000 |
Other |  |  | 180,000 |  |  | 94,000 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  |  | 1,571,000 |  |  | 1,283,000 |
Valuation allowance |  |  | (86,000 | ) |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax assets |  |  | 1,485,000 |  |  | 1,283,000 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Prepaid expenses |  |  | (481,000 | ) |  | (292,000 | )
Property and equipment |  |  | (663,000 | ) |  | (704,000 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred tax liabilities |  |  | (1,144,000 | ) |  | (996,000 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net deferred tax assets |  | $ | 341,000 |  | $ | 287,000 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Schedule of changes in total gross unrecognized tax benefit liabilities, excluding accrued interest |
Balance as of December 31, 2013 |  | $ | 193,000 |
Tax positions related to 2014: |  |  |  |
Additions |  |  | 23,000 |
Reductions |  |  | (160,000 | )
​ | ​ | ​ | ​ | ​
Balance as of December 31, 2014 |  |  | 56,000 |
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
Tax positions related to current year: |  |  |  |
Additions based on tax positions related to the current year |  |  | 12,000 |
Additions based on tax[ib]-positions related to a prior year |  |  | 2,000 |
Reductions based on tax positions related to a prior year |  |  | (9,000 | )
Statute of limitations |  |  | (10,000 | )
​ | ​ | ​ | ​ | ​
Balance as of December 31, 2015 |  | $ | 51,000 |
​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​

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