Condensed Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income/(loss)	$ (85,787)	$ 401,888
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	68,619	68,385
Stock compensation		69,163
Cash settlement of stock options		31,000
Changes in operating assets and liabilities:
Accounts and note receivable	(194,502)	737,890
Inventory	(361,916)	204,848
Deferred taxes	(29,818)
Unbilled revenue	743,966	(1,173,155)
Prepaid expenses and other current assets	(143,341)	(117,869)
Accounts payable and other accrued expenses	461,062	315,941
Deferred revenue and deferred rent	(853,618)	416,926
Net cash provided/(used) by operating activities	(395,335)	955,017
Cash flows from investing activities:
Purchase of property and equipment	(167,490)	(46,775)
Net cash used in investing activities	(167,490)	(46,775)
Cash flows from financing activities:
Repurchase of stock options		(48,500)
Net cash used in financing activities		(48,500)
Net increase (decrease) in cash	(562,825)	859,742
Cash, beginning of period	5,080,445	3,703,579
Cash, end of period	4,517,620	4,563,321
Cash paid:
Taxes	21,698	78,000
Supplemental disclosure of non-cash investing and financing activities:
Conversion of account to note receivable	$ 400,906