Condensed Consolidated Balance Sheets - USD ($)	Mar. 31, 2017	Dec. 31, 2016
Current Assets:
Cash and cash equivalents	$ 14,532,860	$ 4,524,529
Accounts receivable, net of allowance for doubtful accounts of $60,000 and $75,000, respectively	1,467,849	1,195,479
Inventories	70,960	89,499
Prepaid expenses and other current assets	321,419	286,919
Total current assets	16,393,088	6,096,426
Property and equipment, net	2,129,397	1,647,104
Intangible assets, net	15,199	5,000
Deposits	363,403	363,403
Total assets	18,901,087	8,111,933
Current Liabilities:
Accounts payable and other accrued expenses	1,656,708	1,160,299
Accrued compensation and related expenses	413,621	419,034
Related-party notes payable and accrued interest, net of discount of $0 and $6,100, respectively	563,842	651,934
Total current liabilities	2,634,171	2,231,267
Deferred rent liability	199,359	200,264
Total liabilities	2,833,530	2,431,531
Commitments and contingencies
Stockholders’ Equity:
Common stock, $0.001 par value; 50,000,000 shares authorized; 23,937,696 and 17,604,283 issued and outstanding at March 31, 2017 and December 31, 2016, respectively	23,938	17,604
Additional paid-in capital	141,366,712	129,196,680
Accumulated deficit	(125,323,093)	(123,533,882)
Total stockholders’ equity	16,067,557	5,680,402
Total liabilities and stockholders’ equity	18,901,087	8,111,933
Class A convertible preferred stock [Member]
Stockholders’ Equity:
Preferred stock, $0.001 par value; 2,500,000 shares authorized:	0	0
Class B Convertible Preferred Stock [Member]
Stockholders’ Equity:
Preferred stock, $0.001 par value; 2,500,000 shares authorized:	$ 0	$ 0