Schedule of Senior Convertible Note Estimated Fair Value (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021		Jun. 30, 2020
Short-term Debt [Line Items]
Fair Value at March 31, 2020		$ 20,663	$ 8,139	$ 14,660		$ 8,139
Installment repayments – common stock		(5,745)	(1,642)	(956)
Non-installment payments – common stock		(244)	(4)	(7)
Non-installment payments – cash		(54)	(138)	(154)
Change in fair value		(2,120)	4,708	(1,682)
Principal repayments - cash				(11,861)
Fair Value at June 30, 2020		16,200	20,663		[1]	16,200
Face value principal – issue date		4,111	7,000
Fair value adjustment – issue date		(411)	2,600
Lender Fee - April 2020 Senior Convertible Note
Other Income (Expense) [Member]
Short-term Debt [Line Items]
Other Income (Expense) - Change in fair value		2,120	(8,008)			(5,888)
November 2019 Senior Secured Convertible Notes [Member]
Short-term Debt [Line Items]
Fair Value at March 31, 2020		20,600	6,439	1,270		6,439
Installment repayments – common stock		(5,695)		(956)
Non-installment payments – common stock		(242)		(7)
Non-installment payments – cash			(138)
Change in fair value		(2,363)	4,699	(307)
Principal repayments - cash
Fair Value at June 30, 2020		12,300	20,600		[1]	12,300
Face value principal – issue date			7,000
Fair value adjustment – issue date			2,600
Lender Fee - April 2020 Senior Convertible Note
April 2020 Senior Convertible Notes [Member]
Short-term Debt [Line Items]
Fair Value at March 31, 2020				4,600
Installment repayments – common stock
Non-installment payments – common stock
Non-installment payments – cash		(54)		(52)
Change in fair value		254		(437)
Principal repayments - cash				(4,111)
Fair Value at June 30, 2020		3,900			[1]	3,900
Face value principal – issue date		4,111
Fair value adjustment – issue date		(411)
Lender Fee - April 2020 Senior Convertible Note
August 2020 Senior Secured Convertible Notes [Member]
Short-term Debt [Line Items]
Fair Value at March 31, 2020				8,790
Installment repayments – common stock
Non-installment payments – common stock
Non-installment payments – cash				(102)
Change in fair value				(938)
Principal repayments - cash				(7,750)
Fair Value at June 30, 2020	[1]
Other Income (Expense) [Member]
Short-term Debt [Line Items]
Fair Value at March 31, 2020
Installment repayments – common stock
Non-installment payments – common stock
Change in fair value		2,120	(4,708)	1,682
Principal repayments - cash
Fair Value at June 30, 2020					[1]
Other Income (Expense) - Change in fair value				$ 1,682
Face value principal – issue date
Fair value adjustment – issue date		411	(2,600)
Lender Fee - April 2020 Senior Convertible Note		(411)	(700)
December 2018 Senior Secured Convertible Not [Member]
Short-term Debt [Line Items]
Fair Value at March 31, 2020		63	1,700			1,700
Installment repayments – common stock		(50)	(1,642)
Non-installment payments – common stock		(2)	(4)
Non-installment payments – cash
Change in fair value		(11)	9
Fair Value at June 30, 2020			63
Face value principal – issue date
Fair value adjustment – issue date
Lender Fee - April 2020 Senior Convertible Note

[1] As discussed above, all remaining convertible notes were previously repaid during the three months ended March 31, 2021.