Income Taxes - Summary of Effective Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
U.S. federal income taxes at the statutory rate	$ (1,630)	$ (1,503)
State taxes, net of federal effects	(130)	(69)
Permanent differences	21	38
UK Anti-Hybrid expense addback	397	0
Stock-based compensation	30	84
Transaction costs	74	93
Goodwill impairment	473	840
Change in state apportionment rate	(406)	550
Change in valuation allowance	1,421	(20)
Research and development credit	(136)	0
Foreign rate differential	8	0
Other	(122)	0
Income tax expense	$ 0	$ 13

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