CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
	Jul. 02, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019	Jun. 28, 2019
Related party loans made to Company		$ 5,000			$ 5,000			$ 5,000
(Loss) gain on debt extinguishment (Note 7)		0	$ 0		0	$ (2,600)
Common stock purchase warrant issued to the related party lender				$ 1,145		1,150
Excess fair value premium on the newly issued convertible debt				$ 1,382		1,380
Write-off of unamortized debt discount						70
Accrued interest due on the related party loan rolled into principal under modifications		$ 566	274		566	274	$ 229
Proceeds from related party loans	$ 725				$ 0	1,650
Interest Rate Below Market Reduction [Member]
Related party loans made to Company			$ 650			650
Imputed interest on the below market rate recorded as benefit to interest income						$ 13