Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net (loss)/income	$ 337,764	$ (668,222)
Adjustments to reconcile net (loss)/income to net cash (used in) operating activities
Stock-based compensation	163,105	195,221
Depreciation and amortization	215,460	222,562
Deferred tax expense/(benefit)	(132,620)	204,659
Provision for doubtful accounts	(996)	30,723
Changes in operating assets and liabilities
Accounts receivable, net	(297,706)	(1,694,231)
Cost and estimated earnings in excess of billings on contracts in progress	309,020	(952,480)
Inventories, net	(199,193)	139,590
Other current assets	85,213	123,024
Increases (decreases) in operating liabilities:
Accounts payable and accrued expenses	(68,678)	471,283
Billings in excess of costs and estimated earnings on contracts in progress	$ 29,961	1,174,448
Accrued loss on litigation settlement		(4,925,000)
Deferred revenue	$ (297,485)	(333,239)
Net cash (used in) operating activities:	(531,683)	(4,164,060)
Cash flows from investing activities:
Capital expenditures	(31,339)	(122,363)
Net cash (used in) investing activities:	(31,339)	(122,363)
Cash flows from financing activities:
Payments of long-term debt	(180,000)	(180,000)
Net cash used in financing activities:	(180,000)	(180,000)
Net (decrease) in cash and cash equivalents	(743,022)	(4,466,423)
Cash and cash equivalents at beginning of period	13,073,331	11,966,863
Cash and cash equivalents at end of period	12,330,309	7,500,440
Supplemental disclosure of cash flow information:
Income taxes paid	100,000	100,000
Interest paid	$ 19,993	$ 24,725