Stockholders' Equity (Details)		3 Months Ended		12 Months Ended	48 Months Ended	156 Months Ended
	Dec. 10, 2019 USD ($) shares	Mar. 31, 2020 USD ($) item $ / shares shares	Mar. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2005 shares	Dec. 31, 2018 shares
Stockholders' Equity
Common Stock, Shares, Outstanding		107,269,201		107,269,201
Dividends declared and paid
Cash dividend declared per share (in dollars per share) | $ / shares		$ 0.09	$ 0.09
Total Dividends | $		$ 9,654,000	$ 9,651,000
General and Administrative Expense [Member]
Equity-Based Compensation
Compensation cost | $	$ 337,000
2002 Stock Incentive Plan
Equity-Based Compensation
Maximum number of shares provided for grant under equity-based incentive compensation plan		2,000,000
Number of vesting requirements | item		0
Number of shares available for grant under the plan, Beginning		1,906,382	1,944,428	1,944,428
Shares granted	38,046			38,046	55,572	0
Number of shares available for grant under the plan, Ending		1,906,382		1,906,382		1,944,428
Compensation cost | $				$ 337,000