Consolidated Statements of Cash Flows - USD ($)		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net (loss) income		$ (5,201,021)	$ 5,261,411
Adjustments to reconcile net (loss) income to net cash used in operating activities
Stock-based compensation		939,711	932,743
Depreciation and amortization	[1]	1,141,161	867,277
Deferred income tax benefit		(495,228)	831,148
Provision for inventory obsolescence		135,819	606,856
Provision for bad debts		24,000	2,000
Increase (decrease) in operating assets
Accounts receivable		(2,030,603)	(1,453,094)
Contract assets		7,039,227	(5,800,506)
Inventories		967,931	(260,940)
Other current assets		(555,779)	68,112
Increase (decrease) in operating liabilities
Accounts payable		(461,774)	431,836
Accrued expenses		(1,235,064)	795,552
Contract liabilities		70,211	(4,796,025)
Deferred revenue		167,946	134,133
Total adjustments		5,707,558	(7,640,908)
Net cash provided (used in) by operating activities		506,537	(2,379,497)
Cash flows from investing activities:
Capital expenditures		(2,537,652)	(889,298)
Purchase of building			(14,000,886)
Purchase of MesoScribe Technologies			(419,813)
Other assets		3,264	(10,503)
Net cash (used in) investing activities		(2,534,388)	(15,320,500)
Cash flows from financing activities
Current maturities of long-term debt		110,266
Net proceeds from stock options exercised			146,220
Proceeds from mortgage payable			10,387,500
Payments of long-term debt		(853,963)	(300,000)
Net cash (used in) provided by financing activities		(743,697)	10,233,720
Net decrease in cash and cash equivalents		(2,771,548)	(7,466,277)
Cash and cash equivalents at beginning of year		14,210,909	21,677,186
Cash and cash equivalents at end of year		11,439,361	14,210,909
Supplemental disclosure of cash flow information:
Income taxes paid		472,542	601,800
Interest paid		$ 463,850	$ 71,263

[1] Includes amortization expense of $115,800 and $45,645 for the year ending December 31, 2018 and the year ended December 31, 2017, respectively. Such amortization expense relates to other capitalized and intangibles assets.