Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2021

Accounting Policies [Abstract]

Lessee, Assets and Liabilities

The details of our right-of-use asset and lease liability recognized upon adoption of ASC 842 are set forth below:

	January 1, 2021
Right-of-use asset	$	2,101
Straight-line rent accrual	(188)
	$	1,913
Lease liability, current	$	500
Lease liability, non-current	1,601
	$	2,101

Schedules of Concentration Risk

The following table sets forth our concentration of accounts receivable, net of specific allowances for doubtful accounts.

	June 30, 2021		December 31, 2020
Customer A	23	%	16	%
Customer B	15	%	—	%
Customer C	—	%	55	%
Customer D	—	%	13	%

The following table sets forth our concentration of revenue sources as a percentage of total net revenues.

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Customer E	—	%	36	%	1	%	33	%
Customer F	21	%	13	%	19	%	12	%
Customer G	13	%	11	%	12	%	10	%
Customer H	6	%	—	%	11	%	—	%

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The following table sets forth common stock equivalents that have been excluded from the computation of dilutive weighted average shares outstanding as their inclusion would have been anti-dilutive:

	June 30,
	2021	2020
Convertible notes	21,136	593,169
Warrants	5,996,112	3,836,112
Options	1,071,782	1,252,681
Restricted stock units	4,665,060	2,646,242
Restricted shares	574	1,485
Total	11,754,664	8,329,689

Financial Instruments Measured at Fair Value

Determining which category an asset or liability falls within the hierarchy requires significant judgment. Our financial instruments measured at fair value as of June 30, 2021 are set forth below:

	Level 1		Level 2		Level 3		Total
Assets:
Digital currencies	$	773	$	—	$	—	$	773
Total	$	773	$	—	$	—	$	773
Liabilities:
Warrant liability	$	—	$	1,836	$	—	$	1,836
Total	$	—	$	1,836	$	—	$	1,836

    

Our financial instruments measured at fair value as of December 31, 2020 are set forth below:

	Level 1		Level 2		Level 3		Total
Liabilities:
Warrant liability	$	—	$	1,614	$	—	$	1,614
Total	$	—	$	1,614	$	—	$	1,614