Condensed Consolidated Statements of Stockholders' Equity - USD ($)	Total	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated other comprehensive loss
Beginning balance (in shares) at Dec. 31, 2018		71,055,400
Beginning balance at Dec. 31, 2018	$ 479,605,849	$ 710,555	$ 894,272,533	$ (415,377,239)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	29,483			29,483
Issuance of shares due to vesting of restricted shares (in shares)		293,011
Issuance of shares due to vesting of restricted shares		$ 2,929	(2,929)
Cash used to settle net share equity awards	(877,161)		(877,161)
Stock-based compensation	1,445,469		1,445,469
Ending balance (in shares) at Mar. 31, 2019		71,348,411
Ending balance at Mar. 31, 2019	480,203,640	$ 713,484	894,837,912	(415,347,756)
Beginning balance (in shares) at Dec. 31, 2018		71,055,400
Beginning balance at Dec. 31, 2018	479,605,849	$ 710,555	894,272,533	(415,377,239)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,962,673)
Unrealized loss on cash flow hedges	0
Ending balance (in shares) at Jun. 30, 2019		71,348,524
Ending balance at Jun. 30, 2019	475,438,158	$ 713,485	896,064,585	(421,339,912)
Beginning balance (in shares) at Mar. 31, 2019		71,348,411
Beginning balance at Mar. 31, 2019	480,203,640	$ 713,484	894,837,912	(415,347,756)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(5,992,156)			(5,992,156)
Issuance of shares due to vesting of restricted shares (in shares)		113
Issuance of shares due to vesting of restricted shares		$ 1	(1)
Unrealized loss on cash flow hedges	0
Cash used to settle net share equity awards	(536)		(536)
Stock-based compensation	1,227,210		1,227,210
Ending balance (in shares) at Jun. 30, 2019		71,348,524
Ending balance at Jun. 30, 2019	475,438,158	$ 713,485	896,064,585	(421,339,912)
Beginning balance (in shares) at Dec. 31, 2019		71,502,206
Beginning balance at Dec. 31, 2019	481,502,937	$ 715,022	917,862,269	(437,074,354)	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(3,527,759)			(3,527,759)
Issuance of shares due to vesting of restricted shares (in shares)		437,679
Issuance of shares due to vesting of restricted shares		$ 4,377	(4,377)
Unrealized loss on cash flow hedges	(271,868)				(271,868)
Cash used to settle net share equity awards	(1,161,301)		(1,161,301)
Stock-based compensation	836,200		836,200
Ending balance (in shares) at Mar. 31, 2020		71,939,885
Ending balance at Mar. 31, 2020	477,378,209	$ 719,399	917,532,791	(440,602,113)	(271,868)
Beginning balance (in shares) at Dec. 31, 2019		71,502,206
Beginning balance at Dec. 31, 2019	481,502,937	$ 715,022	917,862,269	(437,074,354)	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(24,019,086)
Unrealized loss on cash flow hedges	(921,155)
Ending balance (in shares) at Jun. 30, 2020		71,957,885
Ending balance at Jun. 30, 2020	456,960,818	$ 719,579	918,255,834	(461,093,440)	(921,155)
Beginning balance (in shares) at Mar. 31, 2020		71,939,885
Beginning balance at Mar. 31, 2020	477,378,209	$ 719,399	917,532,791	(440,602,113)	(271,868)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(20,491,327)			(20,491,327)
Issuance of shares due to vesting of restricted shares (in shares)		18,000
Issuance of shares due to vesting of restricted shares		$ 180	(180)
Unrealized loss on cash flow hedges	(649,287)				(649,287)
Stock-based compensation	723,223		723,223
Ending balance (in shares) at Jun. 30, 2020		71,957,885
Ending balance at Jun. 30, 2020	$ 456,960,818	$ 719,579	$ 918,255,834	$ (461,093,440)	$ (921,155)