Consolidated Balance Sheets - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 101,750,937	$ 89,511,710
Short-term investments		5,007,050
Accounts receivable, net	6,918,563	10,536,997
Inventory	2,211,338	1,956,792
Prepaid expenses and other current assets	6,062,715	4,351,074
Total current assets	116,943,553	111,363,623
Operating lease right-of-use asset	730,284	793,252
Property and equipment, net	196,926	210,467
Deposits	8,888	8,888
Total assets	117,879,651	112,376,230
Current Liabilities:
Accounts payable	1,347,577	4,117,447
Accrued expenses and other liabilities	16,287,936	19,981,295
Total current liabilities	17,635,513	24,098,742
Operating lease liability, net of current portion	568,421	647,532
Total liabilities	18,203,934	24,746,274
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.001 par value, 5,000,000 shares authorized: none issued and outstanding at March 31, 2020 and December 31, 2019	0
Common stock, $0.001 par value, 150,000,000 shares authorized; 103,408,699 shares and 103,397,033 shares issued and outstanding at March 31, 2020 and December 31, 2019, respectively	103,409	103,397
Additional paid-in capital	217,751,166	216,205,678
Accumulated deficit	(118,262,609)	(128,688,624)
Accumulated other comprehensive income (loss)	83,751	9,505
Total stockholders' equity	99,675,717	87,629,956
Total liabilities and stockholders' equity	$ 117,879,651	$ 112,376,230