CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY, (Unaudited) - USD ($)	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]
Balances at Dec. 31, 2019	$ 395,507,000	$ 631,000	$ 414,998,000	$ (20,122,000)
Increase (Decrease) in Stockholders' Equity
Net income	(91,199,000)	0	0	(91,199,000)
Cash dividend declared	15,670,000	0	15,670,000	0
Issuance of common stock pursuant to public offerings, net		31,000	19,416,000	0
Issuance of common shares pursuant to stock based compensation plan	59,000	0	59,000	0
Balances at Mar. 31, 2020	308,144,000	$ 662,000	418,803,000	(111,321,000)
Common Stock Shares Outstanding, Beginning Balance at Dec. 31, 2019		63,062,000
Increase (Decrease) in Stockholders' Equity
Stock Issued During Period Shares New Issues		3,171,000
Stock Issued During Period Shares Share Based Compensation		4,000
Common Stock Shares Outstanding, Ending Balance at Mar. 31, 2020		66,237,000
Balances at Dec. 31, 2019	395,507,000	$ 631,000	414,998,000	(20,122,000)
Increase (Decrease) in Stockholders' Equity
Issuance of common stock pursuant to public offerings, net	71,050,000
Balances at Dec. 31, 2020	$ 415,291,000	$ 761,000	432,524,000	(17,994,000)
Common Stock Shares Outstanding, Beginning Balance at Dec. 31, 2019		63,062,000
Increase (Decrease) in Stockholders' Equity
Stock Issued During Period Shares New Issues	13,019,240
Common Stock Shares Outstanding, Ending Balance at Dec. 31, 2020	76,073,317	76,073,000
Increase (Decrease) in Stockholders' Equity
Net income	$ (29,369,000)	$ 0	0	(29,369,000)
Cash dividend declared	17,226,000	0	17,226,000	0
Issuance of common stock pursuant to public offerings, net	96,908,000	182,000	96,726,000	0
Issuance of common shares pursuant to stock based compensation plan	572,000	1,000	571,000	0
Balances at Mar. 31, 2021	$ 466,176,000	$ 944,000	$ 512,595,000	$ (47,363,000)
Increase (Decrease) in Stockholders' Equity
Stock Issued During Period Shares New Issues	18,248,048,000	18,248,000
Stock Issued During Period Shares Share Based Compensation		90,000
Common Stock Shares Outstanding, Ending Balance at Mar. 31, 2021	94,410,960	94,411,000