Stock-Based Compensation - Stock Option Grants and Unrestricted Stock Grants (Details)		1 Months Ended					3 Months Ended		12 Months Ended
	Mar. 27, 2020 USD ($) installment shares	Jan. 31, 2020 USD ($) shares	Oct. 31, 2019 USD ($) installment shares	Sep. 30, 2019 USD ($) installment shares	Jul. 31, 2019 USD ($) shares	Mar. 31, 2019 USD ($) installment shares	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense							$ 83,000	$ 14,000
2001 Nonqualified Stock Plan | 2019 Grant | Directors, officers and employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options granted | shares		56,605			58,548
Number of common stock shares surrendered by employees withholding taxes | shares		14,895			12,952
Common stock value surrendered by employees withholding taxes		$ 50,000			$ 43,000
2001 Nonqualified Stock Plan | Unrestricted Stock | March 27, 2020 Grant | Directors, officers and employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unrestricted stock granted | shares	210,000
Number of installment | installment	2
Total stock-based compensation expense	$ 533,000
Stock-based compensation expense charged to expense							10,000
Remaining stock based compensation expense	$ 523,000
2001 Nonqualified Stock Plan | Unrestricted Stock | September 19, 2019 Grants one | Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unrestricted stock granted | shares				15,000
Total stock-based compensation expense				$ 41,000
2001 Nonqualified Stock Plan | Unrestricted Stock | September 19, 2019 Grants two | Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unrestricted stock granted | shares				80,000
Number of installment | installment				4
Total stock-based compensation expense				$ 220,000
Stock-based compensation expense charged to expense							14,000		$ 16,000
Remaining stock based compensation expense				$ 190,000
2001 Nonqualified Stock Plan | Unrestricted Stock | 2019 Grant | Directors, officers and employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unrestricted stock granted | shares						143,000
Number of installment | installment						2
Total stock-based compensation expense									547,000
Unamortized share-based compensation charges						$ 0
2001 Nonqualified Stock Plan | Unrestricted Stock | 2019 Grant one | Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unrestricted stock granted | shares			7,500
Total stock-based compensation expense			$ 22,000
2001 Nonqualified Stock Plan | Unrestricted Stock | 2019 Grant two | Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of unrestricted stock granted | shares			40,000
Number of installment | installment			4
Total stock-based compensation expense			$ 117,000
Stock-based compensation expense charged to expense							$ 7,000		$ 7,000
Remaining stock based compensation expense			$ 103,000