Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net income/(loss)	$ (2,176,947)	$ 558,404
Adjustments to reconcile net income/(loss) to net cash provided by operating activities
Stock-based compensation	198,871	222,799
Depreciation and amortization	275,426	273,927
Deferred income tax benefit	(459,000)	(2,154)
Provision for inventory obsolescence	25,000
Increase/(decrease) in operating assets
Accounts receivable	1,961,396	(6,920,212)
Contract assets	268,884	4,677,663
Inventories	91,546	235,879
Other current assets	(47,457)	(53,409)
Increase/(decrease) in operating liabilities
Accounts payable	66,700	(70,994)
Accrued expenses	37,319	(178,863)
Contract liabilities	156,573	1,048,695
Deferred revenue	(4,247)	241,489
Total adjustments	2,571,011	(525,180)
Net cash provided by operating activities	394,064	33,224
Cash flows from investing activities:
Capital expenditures	(438,858)	(805,803)
Other assets	22,835	(138,034)
Net cash (used in) investing activities	(416,023)	(943,837)
Cash flows from financing activities
Payments of long-term debt	(164,415)	(165,344)
Net cash (used in) financing activities	(164,415)	(165,344)
Net decrease in cash and cash equivalents	(186,374)	(1,075,957)
Cash and cash equivalents at beginning of period	11,439,361	14,210,909
Cash and cash equivalents at end of period	11,252,987	13,134,952
Supplemental disclosure of cash flow information:
Income taxes paid		200,000
Interest paid	112,461	116,647
Capitalization of right to use Asset	$ 150,000