Balance Sheets - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 106,398,919	$ 130,189,421
Prepaid expenses and other current assets	954,581	1,081,084
Total current assets	107,353,500	131,270,505
Property and equipment, net	3,418,077	2,766,992
Other assets	142,870	55,161
Total assets	110,914,447	134,092,658
Current liabilities:
Accounts payable	3,471,032	2,584,249
Accrued expenses	3,213,715	3,734,348
Short term debt	0	2,271,111
Total current liabilities	6,684,747	8,589,708
Noncurrent liability:
Long term debt	14,953,143	3,025,423
STOCKHOLDERS' EQUITY
Preferred stock, 5,000,000 shares authorized at December 31, 2016 and 2015, zero outstanding	0	0
Common stock, $0.00033 par value, 75,000,000 shares authorized at December 31, 2016 and December 31, 2015, 28,918,516 shares and 28,810,845 shares issued and outstanding at December 31, 2016 and December 31, 2015, respectively	9,756	9,720
Additional paid-in capital	190,341,769	184,721,777
Accumulated deficit	(101,074,968)	(62,253,970)
Total stockholders' equity	89,276,557	122,477,527
Total liabilities and stockholders' equity	$ 110,914,447	$ 134,092,658