Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 161,987,083	$ 47,234,770
Short-term investments	40,952,522	47,060,786
Accounts receivable, net	7,783,502	7,098,191
Inventories	476,622	473,961
Prepaid expenses and other current assets	1,444,303	1,096,855
Total current assets	212,644,032	102,964,563
Property and equipment, net	15,178,619	11,833,057
Operating lease right-of-use assets	8,113,923	4,460,319
Intangible assets, net	4,891,124	5,177,578
Goodwill	10,999,722	10,999,722
Deposits	535,750	437,299
Total assets	252,363,170	135,872,538
Current Liabilities:
Accounts payable and other accrued expenses	9,663,211	2,498,375
Accrued compensation and related expenses	2,554,753	1,903,720
Deferred revenue	236,975	367,867
Operating lease liabilities	666,929	665,901
Finance lease liabilities	63,616	24,617
Total current liabilities	13,185,484	5,460,480
Convertible senior notes, net of discount of $3.8 million	111,155,209	0
Operating lease liabilities, net of current portion	7,814,874	4,101,236
Finance lease liabilities, net of current portion	123,654	8,539
Deferred tax liability	47,943	20,935
Total liabilities	132,327,164	9,591,190
Commitments and contingencies
Stockholders' Equity:
Preferred stock value
Common stock, $0.001 par value; 100,000,000 shares authorized; 38,983,824 and 37,339,787 issued and outstanding at September 30, 2020 and December 31, 2019, respectively	38,984	37,340
Additional paid-in capital	300,273,819	285,609,022
Accumulated deficit	(180,483,423)	(159,319,963)
Accumulated other comprehensive income (loss)	206,626	(45,051)
Total stockholders' equity	120,036,006	126,281,348
Total liabilities and stockholders' equity	252,363,170	135,872,538
Class A convertible preferred stock [Member]
Stockholders' Equity:
Preferred stock value	0	0
Class B convertible preferred stock [Member]
Stockholders' Equity:
Preferred stock value	0	0
Class C convertible preferred stock
Stockholders' Equity:
Preferred stock value	$ 0	$ 0