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Consolidated Statements of Cash Flows - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities:    
Net (loss)/income $ (149,124) $ 3,204,996
Adjustments to reconcile net (loss)/income to net cash used in operating activities    
Stock-based compensation 775,757 750,758
Depreciation and amortization [1] 813,657 826,529
Deferred income tax benefit (435,495) 1,633,254
Provision for doubtful accounts (16,395) (30,826)
Increase/(decrease) in operating assets    
Accounts receivable 2,500,124 3,402,625
Cost in excess of billings on contracts in progress 2,038,500 (2,136,356)
Inventories, net (290,109) 1,855,628
Other current assets (68,473) 27,700
Increase/(decrease) in operating liabilities    
Accounts payable 435,129 (1,374,835)
Accrued expenses (1,503,062) 148,856
Current maturities of long-term debt (280,000) (140,000)
Billings in excess of costs and estimated earnings on contracts in progress 5,262,339 (1,328,508)
Accrued litigation settlement 0 (4,925,000)
Deferred revenue (230,050) (181,008)
Total adjustments 9,001,922 (1,471,183)
Net cash provided by operating activities 8,852,798 1,733,813
Cash flows from investing activities:    
Restricted cash 200,000 200,000
Capital expenditures (112,493) (248,305)
Purchase of assets Tantaline A/S (500,000) 0
Deposits 1,550 960
Net cash (used in) investing activities (410,943) (47,345)
Cash flows from financing activities    
Net proceeds from stock options exercised 462,000  
Payments of long-term debt (300,000) (580,000)
Net cash provided by/(used in) financing activities 162,000 (580,000)
Net increase in cash and cash equivalents 8,603,855 1,106,468
Cash and cash equivalents at beginning of year 13,073,331 11,966,863
Cash and cash equivalents at end of year 21,677,186 13,073,331
Supplemental disclosure of cash flow information:    
Income taxes paid 101,352 427,078
Interest paid $ 79,861 $ 92,101
[1] Includes amortization expense of $31,356 and $24,759 for the years ending December 31, 2016 and 2015, respectively. Such amortization expense relates to other capitalized and intangible assets.