Condensed Statements of Stockholders' Equity (unaudited) - USD ($) shares in Thousands, $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balances (in shares) at Dec. 31, 2021	35,399
Balances at Dec. 31, 2021	$ 354	$ 850,497	$ (82,754)	$ 768,097
Net income (loss)	0	0	(148,727)	(148,727)
Cash dividends declared	$ 0	(27,492)	0	(27,492)
Stock based awards and amortization (in shares)	25
Stock based awards and amortization	$ 0	540	0	$ 540
Balances (in shares) at Mar. 31, 2022	35,424			35,423
Balances at Mar. 31, 2022	$ 354	823,545	(231,481)	$ 592,418
Balances (in shares) at Dec. 31, 2021	35,399
Balances at Dec. 31, 2021	$ 354	850,497	(82,754)	$ 768,097
Issuance of common stock pursuant to public offerings, net (in shares)				3,885,048
Issuance of common stock pursuant to public offerings, net				$ 40,580
Balances (in shares) at Dec. 31, 2022	36,765
Balances at Dec. 31, 2022	$ 368	779,602	(341,207)	438,763
Net income (loss)	0	0	3,530	3,530
Cash dividends declared	$ 0	(18,807)	0	(18,807)
Stock based awards and amortization (in shares)	4
Stock based awards and amortization	$ 0	181	0	$ 181
Issuance of common stock pursuant to public offerings, net (in shares)	2,690			2,690,000
Issuance of common stock pursuant to public offerings, net	$ 26	31,631	0	$ 31,657
Shares repurchased and retired (in shares)	(373)
Shares repurchased and retired	$ (3)	(3,960)	0	$ (3,963)
Balances (in shares) at Mar. 31, 2023	39,086			39,086
Balances at Mar. 31, 2023	$ 391	$ 788,647	$ (337,677)	$ 451,361