Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 31, 2019	12,612
Balances at Dec. 31, 2019	$ 126	$ 415,503	$ (20,122)	$ 395,507
Net (loss) income	0	0	2,128	2,128
Cash dividends declared	$ 0	(53,570)	0	(53,570)
Issuance of common stock pursuant to public offerings, net (in shares)	2,605
Issuance of common stock pursuant to public offerings, net	$ 26	71,024	0	71,050
Stock based awards and amortization (in shares)	2
Stock based awards and amortization	$ 0	244	0	244
Shares repurchased and retired (in shares)	(4)
Shares repurchased and retired	$ 0	(68)	0	$ (68)
Balances (in shares) at Dec. 31, 2020	15,215			15,215
Balances at Dec. 31, 2020	$ 152	433,133	(17,994)	$ 415,291
Net (loss) income	0	0	(64,760)	(64,760)
Cash dividends declared	$ 0	(97,601)	0	$ (97,601)
Issuance of common stock pursuant to public offerings, net (in shares)	20,166			20,165,635
Issuance of common stock pursuant to public offerings, net	$ 202	513,857	0	$ 514,059
Stock based awards and amortization (in shares)	18
Stock based awards and amortization	$ 0	1,108	0	$ 1,108
Balances (in shares) at Dec. 31, 2021	35,399			35,399
Balances at Dec. 31, 2021	$ 354	850,497	(82,754)	$ 768,097
Net (loss) income	0	0	(258,453)	(258,453)
Cash dividends declared	$ 0	(87,906)	0	$ (87,906)
Issuance of common stock pursuant to public offerings, net (in shares)	3,885			3,885,048
Issuance of common stock pursuant to public offerings, net	$ 38	40,542	0	$ 40,580
Stock based awards and amortization (in shares)	30
Stock based awards and amortization	$ 0	1,055	0	1,055
Shares repurchased and retired (in shares)	(2,549)
Shares repurchased and retired	$ (24)	(24,586)	0	$ (24,610)
Balances (in shares) at Dec. 31, 2022	36,765			36,765
Balances at Dec. 31, 2022	$ 368	$ 779,602	$ (341,207)	$ 438,763