Condensed Statements of Cash Flows (USD $)	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
Cash flows from operating activities:
Net loss	$ (7,353,548)		$ (13,933,371)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	881,535		1,107,009
Bad debt expense	700		40,290
Inventory reserve	538,559		325,000
Non-cash interest expense			98,706
Change in fair value of warrant liability	(5,042,780)		89,859
Write-off of unamortized financing costs			41,166
Stock-based equity compensation	332,115		1,097,106
Gain on sale of fixed assets	(4,740)
Changes in operating assets and liabilities:
Accounts receivable	6,979		(68,593)
Inventory	21,509		74,100
Melafind®systems sold	62,238
Prepaid expenses and other current assets	547,371		218,204
Other assets			(3,500)
Accounts payable and accrued expenses	(903,379)		224,958
Other current liabilities	35,414		12,981
Deferred revenue	(141,064)		130,653
Deferred rent	(20,018)		(11,826)
Long-term interest payable			51,922
Net cash used in operating activities	(11,039,109)		(10,505,336)
Cash flows from investing activities:
Purchases of property and equipment			(3,766,264)
Proceeds from the sale of fixed assets	6,000
Net cash provided by (used in) investing activities	6,000		(3,766,264)
Cash flows from financing activities:
Net proceeds from private placements/public offerings	11,452,507		15,789,873
Net proceeds from long-term debt			6,000,000
Expenses related to borrowings and issuance of warrant			(245,358)
Proceeds from exercise of stock options			18,059
Net cash provided by financing activities	11,452,507		21,562,574
Net increase in cash and cash equivalents	419,398		7,290,974
Cash and cash equivalents at beginning of period	3,782,881	[1]	7,861,524
Cash and cash equivalents at end of period	4,202,279		15,152,498
Non-cash investing activity:
Reclassification of warrant liability to stockholders' equity			$ 652,442

[1] Derived from the audited balance sheet as of December 31, 2013