Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Operating activities:
Net loss	$ (1,669,258)	$ (1,046,795)
Noncash adjustments:
Depreciation and amortization	200,378	213,542
Amortization of debt discount	249,209	26,854
Non-cash consulting expense/stock option expense	29,310	518,536
Non-cash interest	(26,759)	0
Provision for losses on accounts receivable and inventory	85,388	5,592
Change in derivative warrant liability	(635,355)	(217,551)
Increase/(reduction) of contingent liability	7,206	(212,026)
Changes in operating assets and liabilities:
Accounts receivable	(106,880)	(525,675)
Inventories	(455,773)	(1,978,796)
Prepaid and other current assets	(302,808)	(126,930)
Accounts payable	(145,014)	1,313,599
Accrued liabilities	488,758	(909,349)
Net cash used in operating activities	(2,281,598)	(2,938,999)
Investing activities:
Purchases of property and equipment and intangible assets	(477,837)	(347,659)
Net cash used in investing activities	(477,837)	(347,659)
Financing activities:
Payments on long-term debt	(12,032)	(10,682)
Payments on capital leases	(35,520)	(10,237)
Proceeds from issuance of stock	0	3,899,996
Proceeds from exercise of options	0	20,099
Net cash (used in) provided by financing activities	(47,552)	3,899,176
Net change in cash and cash equivalents	(2,806,987)	612,518
Cash and cash equivalents at beginning of period	4,926,066	751,111
Cash and cash equivalents at end of period	$ 2,119,079	$ 1,363,629