Statements Of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net loss	$ (4,674,268)	$ (6,081,326)
Adjustments to reconcile net loss to cash used in operating activities:
Depreciation	134,025	237,497
Amortization of intangibles	149,917	149,917
Amortization of deferred finance costs	111,018	126,535
Share-based compensation	637,246	739,807
Adjustment of warrants	(106,792)	(104,987)
Changes in operating assets and liabilities:
Accounts receivable	(969,414)	1,122,271
Inventories	609,088	(1,177,346)
Prepaid expenses and other current assets	244,527	194,767
Other assets	67,541	130
Accounts payable	(60,014)	(356,938)
Accrued liabilities	497,625	(787,374)
Deferred revenue	(435,029)	482,790
Other liabilities	(409,358)
Net cash used in operating activities	(4,203,888)	(5,454,257)
Cash flows from investing activities
Purchase of equipment	(52,410)	(41,140)
Net cash used in investing activities	(52,410)	(41,140)
Cash flows from financing activities
Payments of Healthcare Royalty Partners debt	(80,328)	(24,290)
Proceeds from issuance of stock, net of issuance costs	695,598	2,342,275
Net cash provided by financing activities	615,270	2,317,985
Net decrease in cash and cash equivalents	(3,641,028)	(3,177,412)
Cash and cash equivalents at beginning of period	7,270,301	13,775,130
Cash and cash equivalents at end of period	$ 3,629,273	$ 10,597,718