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Stockholders' Equity - Stock Awards (Details) - USD ($)					12 Months Ended
	Dec. 24, 2020	May 20, 2020	Mar. 30, 2020	Feb. 27, 2019	Dec. 31, 2020	Dec. 31, 2019
Other disclosures
Compensation expense					$ 200,000	$ 500,000
Unrecognized compensation expense					$ 200,000
Weighted average period of recognition					1 year 22 days
Restricted Stock
Number of Other than Options
Outstanding and exercisable, beginning balance (in shares)					1,230,623
Granted (in shares)					639,728
Vested (in shares)					(1,089,518)
Outstanding and exercisable, ending balance (in shares)					780,833	1,230,623
Weighted Average Exercise Price
Outstanding, beginning balance (in dollars per share)					$ 4.33
Granted (in dollars per share)					0.82
Vested (in dollars per share)					2.43
Outstanding, ending balance (in dollars per share)					$ 4.09	$ 4.33
Other disclosures
Compensation expense					$ 600,000	$ 500,000
Unrecognized compensation expense					$ 10,000
Weighted average period of recognition					3 months
Restricted Stock | Senior Management
Number of Other than Options
Granted (in shares)			336,700
Other disclosures
Compensation expense					$ 300,000	200,000
Restricted Stock | Employees
Number of Other than Options
Granted (in shares)	32,300	270,728
Other disclosures
Compensation expense	$ 40,000	$ 300,000
Performance Shares | Key Employees
Other disclosures
Term of employment				2 years
Performance stock bonus					$ 90,000	$ 90,000

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