CONDENSED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net (loss) / income	$ (23,444)	$ 277,522
Adjustments to reconcile net (loss) / income to net cash provided by operating activities:
Depreciation and amortization	529,097	343,115
Stock-based compensation	175,001	160,230
Changes in assets and liabilities:
Accounts receivable	(1,280,339)	(411,733)
Prepaid expenses, other current assets, and income tax receivable	750,523	661,832
Accounts payable	547,685	(426,108)
Accrued expenses	(458,939)	(69,504)
Deferred income taxes	(60,662)	(62,089)
Net cash provided by operating activities	178,922	473,265
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of equipment and leasehold improvements	(200,538)	(128,053)
Cost of internally developed software	(30,091)	(66,981)
Other assets	(25,611)	(62,143)
Write-off capitalized patent costs	0	73,602
Net cash used in investing activities	(256,240)	(183,575)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from equipment financing	609,844	0
Payments of equipment financing	(404,908)	(349,981)
Cash dividends paid	(813,381)	(806,260)
Net cash used in financing activities	(608,445)	(1,156,241)
Net decrease in cash and cash equivalents	(685,763)	(866,551)
Cash and cash equivalents, beginning of period	2,689,464	3,612,153
Cash and cash equivalents, end of period	2,003,701	2,745,602
Supplemental Disclosures of Cash Flow Information:
Cash paid for income taxes	2,233	2,870
Cash paid for interest	34,285	33,201
Purchases of equipment through accrued liabilities	$ 370,895	$ 55,990