Consolidated Statements of Cash Flows - USD ($)	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (20,652,565)	$ (5,484,194)
Adjustments to reconcile net loss to net cash used in operating activities:
Change in fair value of contingent consideration	13,640,000
Stock-based compensation expense	545,431	697,486
Depreciation	120,169	121,899
Amortization	25,876	107,580
Unrealized losses (gains) on foreign currency exchange	(18,851)	(24,943)
Changes in fair value of warrant liability		46,000
Changes in operating assets and liabilities:
Accounts receivable	(160,920)	832,098
Prepaid expenses and other current assets	(343,337)	(113,200)
Accounts payable	176,985	(102,763)
Accrued expenses and other liabilities	26,761	(1,181,457)
Tax refund receivable	(4,877,851)	(71,586)
Net cash used in operating activities	(11,518,302)	(5,173,080)
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from sales and maturities of short-term investments	24,900,000
Purchases of short-term investments	(12,118,563)
Purchase of property and equipment	(40,601)	(1,226)
Cash paid for internally developed patents	(79,336)	(15,874)
Net cash provided by (used in) investing activities	12,661,500	(17,100)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments of deferred offering costs	(179,743)
Proceeds from exercises of warrants	31,310,137	30,324
Proceeds from issuance of common stock in at the market offering, net of offering costs	22,780,729
Proceeds from issuance of common units, net of issuance costs		12,668,784
Proceeds from issuance of notes payable	632,000
Proceeds from issuance of common stock from Employee Stock Purchase Plan	56,739
Proceeds from exercises of stock options	36,175
Payments of notes payable		(156,145)
Net cash provided by financing activities	54,636,037	12,542,963
Net increase in cash and cash equivalents and restricted cash	55,779,235	7,352,783
Cash, cash equivalents and restricted cash at beginning of period	8,996,860	34,353,129
Cash, cash equivalents and restricted cash at end of period	$ 64,776,095	$ 41,705,912