Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net income/(loss)	$ 2,280,909	$ (833,348)
Adjustments to reconcile net income/(loss) to net cash provided by/(used in) operating activities:
Stock-based compensation expense	435,536	346,255
Depreciation and amortization	417,730	425,308
Deferred tax expense/(benefit)	488,038	(632,992)
Provision for doubtful accounts	2,817	40,012
Accounts receivable, net	(1,247,342)	(4,720,127)
Costs and estimated earnings in excess of billings on contracts in progress	(430,568)	1,775,431
Inventories	184,982	(98,706)
Other current assets	(109,056)	172,178
Increases/(decreases) in operating liabilities:
Accounts payable and accrued expenses	609,699	(692,309)
Billings in excess of costs and estimated earnings on contracts in progress	(2,277,718)	5,192,876
Deferred revenue	20,877	(280,893)
Total adjustments	(1,905,005)	1,527,033
Net cash provided by operating activities	375,904	693,685
Cash flows from investing activities:
Release of restricted cash		200,000
Capital expenditures	(451,387)	(34,003)
Deposits	3,245	1,550
Net cash (used in) investing activities	(448,142)	167,547
Cash flows from financing activities:
Net proceeds from stock options exercised	22,120	462,000
Payments of long-term debt	(150,000)	(360,000)
Net cash (used in)/provided by financing activities	(127,880)	102,000
Net (decrease)/increase in cash and cash equivalents	(200,118)	963,232
Cash and cash equivalents at beginning of period	21,677,186	13,073,331
Cash and cash equivalents at end of period	21,477,068	14,036,563
Supplemental disclosure of cash flow information:
Income taxes paid	401,800	100,000
Interest paid	$ 35,244	$ 42,455