CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 22,578,980	$ 67,493,047
Short-term investments	28,004,561	0
Accounts receivable	158,537	98,736
Prepaid expenses and other assets	877,853	789,285
Total current assets	51,619,931	68,381,068
Property and equipment, net	4,731,738	2,690,579
Other assets	371,243	374,004
Total Assets	56,722,912	71,445,651
Current liabilities:
Accounts payable	1,115,340	1,040,868
Accrued expenses	3,627,005	1,934,411
Current portion of long-term debt	6,146,744	5,225,818
Total current liabilities	10,889,089	8,201,097
Long-term debt, less current portion	9,031,389	11,246,188
Derivative financial instruments	2,710,451	3,297,077
Other liabilities	1,519,109	0
Total Liabilities	24,150,038	22,744,362
Commitments and contingencies (Note 9)
Stockholders’ equity
Preferred stock, $0.001 par value, 20,000,000 shares authorized; 60,600 shares outstanding at June 30, 2016 and December 31, 2015; designated as Series A Convertible Preferred Stock with liquidation preference of $606,000 at June 30, 2016 and December 31, 2015	60	60
Common stock, $0.0001 par value, 150,000,000 shares authorized; 30,147,305 and 29,737,601 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	3,015	2,974
Additional paid-in capital	161,930,622	157,585,498
Accumulated other comprehensive income	3,336	0
Accumulated deficit	(129,364,159)	(108,887,243)
Total stockholders’ equity	32,572,874	48,701,289
Total liabilities and stockholders’ equity	$ 56,722,912	$ 71,445,651