Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (192,175)	$ (2,611,040)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	1,902,353	2,077,268
Deferred income taxes	(37,000)	220,610
Stock-based compensation	352,664	292,309
Loss on disposal of property and equipment	4,698	11,177
Non-cash interest expense on warrants related to debt discount	0	19,937
Interest on accrued contingent consideration	0	19,836
Changes in operating assets and liabilities:
Trade accounts receivable, net	532,641	237,001
Inventory	(250,281)	(300,358)
Prepaid expenses and other current assets	(102,664)	(320,987)
Accounts payable	(523,662)	659,647
Accrued commissions	105,846	390,330
Accrued compensation	(156,480)	(249,428)
Accrued contingent consideration	(72,000)	(188,000)
Accrued expenses and other current liabilities	(458,972)	(687,756)
Deferred revenue and customer advances	62,824	1,676,579
Net cash provided by operating activities	1,167,792	1,247,125
Cash flows from investing activities:
(Increase) decrease in other assets	(181,269)	72,699
Purchases of property and equipment, net of disposals	(52,010)	(65,489)
Net cash (used in) provided by investing activities	(233,279)	7,210
Cash flows from financing activities:
Proceeds from exercise of stock options	152,254	107,814
Purchase of treasury stock	(19,499)	(34,575)
Principal payments on long-term debt	0	(1,000,000)
Principal payments on notes payable	(500,000)	0
Payments of contingent consideration	0	(1,435,548)
Principal payments on capital lease obligations	(2,034)	(8,370)
Net cash used in financing activities	(369,279)	(2,370,679)
Net increase (decrease) in cash and cash equivalents	565,234	(1,116,344)
Cash and cash equivalents, beginning of period	1,725,136	3,307,822
Cash and cash equivalents, end of period	2,290,370	2,191,478
Supplemental Disclosure of Cash Flow Information:
Net cash paid for interest	424,561	480,623
Net cash paid for income taxes	15,190	98,050
Non-cash activities:
Contingent consideration settled with common stock	928,000	0
Equipment acquired under capital leases	$ 0	$ 21,416