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Stock-based Compensation (Tables)
 3 Months Ended
Mar. 31, 2021
Share-based Payment Arrangement [Abstract]  
Summary of stock option activity The following table summarizes stock option activity for the three-month periods ended March 31, 2021 and 2020:
Stock
Options		Grant Date
Weighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life (in
Years)		Intrinsic
Value
Outstanding at January 1, 2020450,000 $2.78 2.44$27,000 
Outstanding at March 31, 2020450,000 $2.78 2.20$— 
Exercisable at March 31, 2020425,000 $2.79 2.00$— 
Outstanding at January 1, 2021417,000 $2.79 1.61$2,000 
Outstanding at March 31, 2021417,000 $2.79 1.36$19,000 
Exercisable at March 31, 2021407,000 $2.80 1.27$—