Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (3,203,338)	$ (2,245,241)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	3,116,907	2,265,386
Deferred income taxes	326,415
Share-based compensation	435,234	319,619
Loss on disposal of property and equipment	11,177
Gain on sale of investment		(53,106)
Non-cash interest expense on warrants	29,905
Interest on accrued contingent consideration	23,124	75,070
Changes in operating assets and liabilities:
Trade accounts receivable	134,592	(2,372,194)
Inventory	(346,780)	(454,026)
Prepaid expenses and other current assets	(77,908)	(345,068)
Accounts payable	576,980	680,297
Accrued commissions	439,761	130,671
Accrued compensation	(242,671)	(245,838)
Accrued expenses, contingent consideration and other current liabilities	(1,153,133)	317,947
Deferred revenue and customer advances	2,095,996	3,292,192
Net cash provided by operating activities	2,166,261	1,365,709
Cash flows from investing activities:
Decrease in other assets	34,078
Proceeds from sale of investment		770,042
Proceeds from sale of property and equipment	8,750
Purchases of property and equipment	(128,967)	(346,423)
Net cash (used in) provided by investing activities	(86,139)	423,619
Cash flows from financing activities:
Proceeds from exercise of stock options	113,815	152,695
Purchase of treasury stock	(34,838)	(2,577)
Proceeds from issuance of long-term debt		2,500,000
Principal payments on long-term debt	(1,500,000)
Principal payments on notes payable		(1,000,000)
Payments of contingent consideration	(1,435,548)	(2,250,000)
Principal payments on capital lease obligations	(12,996)	(13,157)
Net cash used in financing activities	(2,869,567)	(613,039)
Net (decrease) increase in cash and cash equivalents	(789,445)	1,176,289
Cash and cash equivalents, beginning of period	3,307,822	1,837,801
Cash and cash equivalents, end of period	2,518,377	3,014,090
Supplemental disclosure of cash flow information:
Cash paid for interest	(724,033)	(192,009)
Cash paid for income taxes	(123,587)	(99,937)
Non-cash activities:
Equipment acquired under capital leases	$ 21,416