Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 558,404	$ 1,024,034
Adjustments to reconcile net income to net cash provided by (used in) operating activities
Stock-based compensation	222,799	217,455
Depreciation and amortization	273,927	207,105
Deferred tax (benefit)/expense	(2,154)	291,174
Provision for doubtful accounts	361	892
(Increases)/decreases in operating assets:
Accounts receivable	(6,920,573)	(7,438,955)
Contract assets	4,677,663	852,852
Inventories, net	235,879	543,141
Other current assets	(53,409)	(240,519)
Increases (decreases) in operating liabilities:
Accounts payable and accrued expenses	(249,858)	295,489
Current maturities of long-term debt	3,411
Contract liabilities	1,048,695	(609,518)
Deferred revenue	241,489	1,928,808
Total adjustments	(521,769)	(3,952,076)
Net cash provided by (used in) operating activities:	36,635	(2,928,042)
Cash flows from investing activities:
Capital expenditures	(805,803)	(284,735)
Deposits	(141,445)	(10,625)
Net cash used in investing activities:	(947,248)	(295,360)
Cash flows from financing activities:
Payments of long-term debt	(165,344)	(75,000)
Net cash used in financing activities:	(165,344)	(75,000)
Net decrease in cash and cash equivalents	(1,075,957)	(3,298,402)
Cash and cash equivalents at beginning of period	14,210,909	21,677,186
Cash and cash equivalents at end of period	13,134,952	18,378,784
Supplemental disclosure of cash flow information:
Income taxes paid	200,000
Interest paid	$ 116,647	$ 17,637