CONDENSED STATEMENTS OF CASH FLOWS (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 277,522	$ 756,159
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	343,115	218,019
Stock-based compensation	160,230	152,008
Changes in assets and liabilities:
Accounts receivable	(411,733)	(449,799)
Prepaid expenses, other current assets, and income tax receivable	661,832	(55,710)
Accounts payable	(426,108)	267,998
Accrued expenses	(69,504)	(1,088,173)
Deferred income taxes	(62,089)	(58,608)
Net cash provided by (used in) operating activities	473,265	(258,106)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of equipment and leasehold improvements	(128,053)	(1,524,432)
Cost of internally developed software	(66,981)	(147,192)
Other assets	(62,143)	(134,447)
Write-off capitalized patent costs	73,602	0
Net cash used in investing activities	(183,575)	(1,806,071)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net proceeds from exercise of stock options	0	47,564
Proceeds from long-term debt	0	1,052,943
Payments of long-term debt	(349,981)	0
Cash dividends paid	(806,260)	(798,054)
Net cash provided by (used in) financing activities	(1,156,241)	302,453
Net decrease in cash and cash equivalents	(866,551)	(1,761,724)
Cash and cash equivalents, beginning of period	3,612,153	3,970,512
Cash and cash equivalents, end of period	2,745,602	2,208,788
Supplemental Disclosures of Cash Flow Information:
Cash paid for income taxes	2,870	0
Cash paid for interest	33,201	0
Purchases of equipment through accrued liabilities	$ 55,990	$ 1,083,948