Statements Of Cash Flows (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net loss	$ (3,135,581)us-gaap_NetIncomeLoss	$ (4,139,848)us-gaap_NetIncomeLoss
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation	70,256us-gaap_Depreciation	136,663us-gaap_Depreciation
Amortization of intangibles	74,959us-gaap_AmortizationOfIntangibleAssets	74,958us-gaap_AmortizationOfIntangibleAssets
Amortization of deferred finance costs	55,793	70,122
Share-based compensation	326,444us-gaap_ShareBasedCompensation	307,992us-gaap_ShareBasedCompensation
Adjustment of warrants	892,377	1,076,139
Changes in operating assets and liabilities:
Accounts receivable	(1,256,119)	(768,628)
Inventories	(4,179)us-gaap_IncreaseDecreaseInInventories	(694,085)us-gaap_IncreaseDecreaseInInventories
Prepaid expenses and other current assets	92,225	(53,993)
Other assets	35,983	(62)
Accounts payable	250,495	(357,303)
Accrued liabilities	(263,221)	725,025
Deferred revenue	(352,450)	1,244,840
Other liabilities	(75,682)
Net cash used in operating activities	(3,288,700)	(2,378,180)
Cash flows from investing activities
Purchase of equipment	(52,410)
Net cash used in investing activities	(52,410)
Cash flows from financing activities
Payments of Healthcare Royalty Partners debt	(68,869)us-gaap_RepaymentsOfSecuredDebt	(38,592)us-gaap_RepaymentsOfSecuredDebt
Proceeds from issuance of stock, net of issuance costs	578,211	(56,514)
Net cash provided (used) by financing activities	509,342	(95,106)
Net increase (decrease) in cash and cash equivalents	(2,831,768)	(2,473,286)
Cash and cash equivalents at beginning of period	7,270,301	13,775,130
Cash and cash equivalents at end of period	$ 4,438,533	$ 11,301,844

Proceeds From Issuance Of Common Stock Net Of Issuance Costs

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