Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 47,234,770	$ 37,327,125
Short-term investments	47,060,786	9,930,968
Accounts receivable, net of allowance for doubtful accounts of $100,000 and $70,000, respectively	7,098,191	3,543,666
Inventories	473,961	220,514
Prepaid expenses and other current assets	1,096,855	752,269
Total current assets	102,964,563	51,774,542
Property and equipment, net	11,833,057	4,357,498
Operating lease right-of-use assets	4,460,319	0
Intangible assets, net		137,220
Goodwill	10,999,722	0
Deposits	437,299	350,837
Total assets		56,620,097
Current Liabilities:
Accounts payable and other accrued expenses	2,498,375	1,709,397
Accrued compensation and related expenses	1,903,720	1,262,478
Operating lease liabilities	665,901	0
Finance lease liabilities	24,617	23,191
Deferred revenue	367,867	66,315
Total current liabilities	5,460,480	3,061,381
Convertible note, net of discount of $288,400 as of December 31, 2018	0	14,711,580
Operating lease liabilities, net of current portion	4,101,236	0
Finance lease liabilities, net of current portion	8,539	33,156
Deferred rent liability, net of current portion	0	267,415
Deferred tax liability	20,935	0
Total liabilities	9,591,190	18,073,532
Commitments and contingencies
Stockholders' Equity:
Common stock, $0.001 par value; 100,000,000 shares authorized; 37,339,787 and 30,319,038 issued and outstanding at December 31, 2019 and 2018, respectively	37,340	30,319
Additional paid-in capital	285,609,022	179,501,577
Accumulated deficit	(159,319,963)	(140,988,484)
Accumulated other comprehensive income (loss)	(45,051)	3,153
Total stockholders' equity	126,281,348	38,546,565
Total liabilities and stockholders' equity	135,872,538	56,620,097
Class A convertible preferred stock [Member]
Stockholders' Equity:
Preferred stock value
Class B convertible preferred stock [Member]
Stockholders' Equity:
Preferred stock value