Income Taxes - Narrative (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income tax expense $ 273,000 $ 11,501,000 $ 792,000
Net operating loss carry-forwards 66,100,000 66,100,000 66,100,000
Interest and penalties accrued $ 0 $ 0 $ 0
SRAM      
U.S. statutory federal income tax rate   21.00%  
Non-deductible expense executive compensation   $ 600,000  
Net of federal income tax benefit   600,000  
SRAM | US Federal Income Tax      
Income tax expense   10,200,000  
SRAM | State Income Tax      
Income tax expense   $ 700,000