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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Cash flows from operating activities:    
Net (loss)/income $ 833,348 $ (2,003,135)
Adjustments to reconcile net (loss)/income to net cash provided by/(used in) operating activities:    
Stock-based compensation expense 346,255 370,673
Depreciation and amortization 425,308 444,792
Deferred tax (benefit)/expense (632,991) 26,920
Provision for doubtful accounts 40,012 31,187
Changes in operating assets and liabilities:    
Accounts receivable (4,720,127) (81,170)
Costs and estimated earnings in excess of billings on contracts in progress 1,775,431 (830,695)
Inventories (98,706) 637,177
Income taxes - current   511,158
Other current assets 172,178 94,037
Increases/(decreases) in operating liabilities:    
Accounts payable and accrued expenses (692,310) 1,678,912
Billings in excess of costs and estimated earnings on contracts in progress 5,192,876 (928,290)
Accrued loss on litigation settlement   (4,925,000)
Deferred revenue (280,893) (309,267)
Total adjustments 1,527,033 3,279,566
Net cash provided by/(used in) operating activities 693,685 (1,276,431)
Cash flows from investing activities:    
Release of restricted cash 200,000  
Capital expenditures (34,003) (166,846)
Deposits 1,550  
Net cash provided by/(used in) investing activities 167,547 (166,846)
Cash flows from financing activities:    
Net proceeds from stock options exercised 462,000  
Payments of long-term debt (360,000) (360,000)
Net cash provided by/(used in) financing activities 102,000 (360,000)
Net increase/(decrease) in cash and cash equivalents 963,232 (1,803,277)
Cash and cash equivalents at beginning of period 13,073,331 11,966,863
Cash and cash equivalents at end of period 14,036,563 10,163,586
Supplemental disclosure of cash flow information:    
Income taxes paid 100,000 100,000
Interest paid $ 42,455 $ 48,865