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Stock-Based Compensation - Restricted Stock Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended			6 Months Ended
	Jul. 31, 2020	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Restricted Stock Activity, Weighted-Average Grant Date Fair Value
Share-based compensation		$ 562	$ 404		$ 1,107	$ 1,515
2013 Stock Incentive Plan
Restricted Stock Activity, Number of Shares
Nonvested shares, Ending Balance		548,491			548,491
Restricted Stock Activity, Weighted-Average Grant Date Fair Value
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		4,648,994			4,648,994
Restricted stock units
Restricted Stock Activity, Number of Shares
Nonvested shares, Beginning Balance					68,675
Vested					(27,212)
Nonvested shares, Ending Balance		41,463			41,463
Restricted Stock Activity, Weighted-Average Grant Date Fair Value
Nonvested shares, Weighted Average Grant Date Fair Value, Beginning Balance					$ 2.30
Vested, Weighted-Average Grant Date Fair Value					2.43
Nonvested shares, Weighted Average Grant Date Fair Value, Ending Balance		$ 2.21			$ 2.21
Accelerated vesting, number of shares				137,872
Recognized compensation expense					$ 100
Unrecognized compensation expense		$ 100			$ 100
Weighted average remaining period over which unrecognized compensation expense will be recognized					1 year 2 months 12 days
Market/Performance-based Awards
Restricted Stock Activity, Number of Shares
Nonvested shares, Beginning Balance					507,028
Nonvested shares, Ending Balance		507,028			507,028
Restricted Stock Activity, Weighted-Average Grant Date Fair Value
Nonvested shares, Weighted Average Grant Date Fair Value, Beginning Balance					$ 1.54
Nonvested shares, Weighted Average Grant Date Fair Value, Ending Balance		$ 1.54			$ 1.54
Weighted average remaining period over which unrecognized compensation expense will be recognized					4 months 24 days
Requisite service period (in years)	2 years 4 months 9 days
Share-based compensation					$ 100
Unrecognized compensation expense related to the restricted stock units		$ 100			100
Additional compensation expense as a result of meeting certain achievements					$ 300