Equity and Stock-based Compensation - Performance Share Award (Details) - USD ($)	1 Months Ended	3 Months Ended
	Sep. 30, 2019	Mar. 31, 2021	Mar. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total stock-based compensation expense		$ 197,000	$ 83,000
Performance Share Awards | 2001 Nonqualified Stock Plan | Officer
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted (in shares)	20,000
Total stock-based compensation expense		0	24,000
Share based compensation expense for the total grant	$ 55,000
Performance Share Awards | 2001 Nonqualified Stock Plan | Officer | October 2019 Grant
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted (in shares)	10,000
Total stock-based compensation expense		$ 0	$ 14,000
Share based compensation expense for the total grant	$ 29,000