Stockholders’ Equity (Details) - USD ($)				1 Months Ended	6 Months Ended		12 Months Ended
	Feb. 21, 2020	Feb. 06, 2020	Mar. 22, 2019	Feb. 29, 2020	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	May 18, 2020	Feb. 19, 2020	Feb. 04, 2020
Class of Stock [Line Items]
Increase in common stock issuable (in shares)								2,900,000
Preferred stock, authorized (in shares)					2,000,000		2,000,000
Preferred shares, par value (in dollars per share)					$ 0.0001		$ 0.0001
Preferred shares, shares issued (in shares)					0		0
Preferred shares, shares outstanding (in shares)					0		0
Common shares, shares authorized (in shares)					170,000,000		170,000,000
Common shares, par value (in dollars per share)					$ 0.0001		$ 0.0001
Common Shares, shares issued (in shares)					70,156,922		65,378,890
Common Shares, shares outstanding (in shares)					70,156,922		65,378,890
Issuance of common stock (in shares)					987,716		1,840,443
Proceeds from the issuance of common shares				$ 8,000,000.0	$ 2,034,073		$ 5,383,079
Weighted average selling price (in dollars per share)					$ 2.06		$ 2.92
Common share issuance costs					$ 56,443		$ 309,479
Remaining amount available for sale					32,600,000
Maximum
Class of Stock [Line Items]
Sales agreement, threshold sale of shares			$ 40,000,000.0
Public offering
Class of Stock [Line Items]
Issuance of common stock (in shares)		3,191,489
Proceeds from the issuance of common shares	$ 8,000,000.0				8,147,871	$ 17,500,002
Common share issuance costs	$ 100,000				$ 143,914	$ 1,379,323
Common stock reserved for future issuance (up to) (in shares)										3,670,212
Share price (in dollars per share)		$ 2.22							$ 2.22
Over allotment
Class of Stock [Line Items]
Common stock reserved for future issuance (up to) (in shares)									478,723	478,723