Liquidity and Financial Condition (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended		9 Months Ended
	Oct. 15, 2020	Aug. 20, 2020	May 24, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Purchase Commitment				$ 37,153
Deposits paid				12,803
Cash and cash equivalents				30,086	$ 15,163		$ 7,440		$ 225
Cryptocurrencies				9,000
Working capital				39,300
Stockholders' equity				60,668	28,191	$ 27,809	26,235	$ 26,138	$ 4,491
Accumulated deficit				233,822			$ 217,238
Proceeds from the sale of stock				49,551	$ 23,611
H.C. Wainwright [Member] | Termination of 2019 ATM Offering [Member] | Subsequent Event [Member]
Gross proceeds	$ 74,000
Number of shares sold	30,600,000
Common Stock [Member]
Stock issued during period		200,000
Common Stock [Member] | H.C. Wainwright [Member] | Subsequent Event [Member]
Maximum amount of sales shares	$ 100,000
Percentage of commission	3.00%
Common Stock [Member] | H.C. Wainwright [Member] | 2019 ATM Offering [Member]
Maximum amount of sales shares			$ 100,000
Proceeds from the sale of stock				$ 49,600
Percentage of commission				3.00%
Commsion paid				$ 1,600
Weighted average price				$ 2.23
Stock issued during period				22,210,095
Common Stock [Member] | H.C. Wainwright [Member] | 2020 ATM Offering [Member] | Subsequent Event [Member]
Maximum amount of sales shares	$ 100,000
Percentage of commission	3.00%
Miners received from Bitmain [Member]
Purchase Commitment				$ 37,200
Deposits paid				12,800
Remaining amount due in second quarter of 2021				$ 24,400