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Note 14 - Equity

6 Months Ended

Jun. 30, 2020

Notes to Financial Statements

Stockholders' Equity Note Disclosure [Text Block]

The tables below present changes in stockholders' equity for the three and six months ended June 30, 2020 and 2019.

		*Common Stock*								*Additional Paid-in*				*Accumulated*				*Other Comprehensive*				*Total Stockholders'*
		*Shares*				*Amount*				*Capital*				*Deficit*				*Income*				*Equity*
Balances at March 31, 2020			81,047,424			$	8,105			$	221,057,307			$	(132,923,290	)		$	—			$	88,142,122
Net income							—				—				20,890,158				—				20,890,158
Repurchase of common stock			(2,548,681	)			(255	)			—				(15,222,540	)			—				(15,222,795	)
Payment of common stock tendered for employee stock-based compensation tax obligations			—				—				—				—				—				—
Issuance of common stock upon vesting of RSUs			120,000				12				(12	)			—				—				—
Stock-based compensation			—				—				323,533				—				—				323,533
Balances at June 30, 2020			78,618,743			$	7,862			$	221,380,828			$	(127,255,672	)		$	—			$	94,133,018

		*Common Stock*								*Additional Paid-in*				*Accumulated*				*Other Comprehensive*				*Total Stockholders'*
		*Shares*				*Amount*				*Capital*				*Deficit*				*Income*				*Equity*
Balances at December 31, 2019			81,269,868			$	8,127			$	220,808,037			$	(123,032,408	)		$	—			$	97,783,756
Net income			—				—				—				11,992,629				—				11,992,629
Repurchase of common stock			(2,773,775	)			(277	)			—				(16,215,893	)			—				(16,216,170	)
Payment of common stock tendered for employee stock-based compensation tax obligations			(1,892	)			—				(9,746	)			—				—				(9,746	)
Issuance of common stock upon vesting of RSUs			124,542				12				(12	)			—				—				-
Stock-based compensation			—				—				582,549				—				—				582,549
Balances at June 30, 2020			78,618,743			$	7,862			$	221,380,828			$	(127,255,672	)		$	—			$	94,133,018

		*Common Stock*								*Additional Paid-in*				*Accumulated*				*Other Comprehensive*				*Total Stockholders'*
		*Shares*				*Amount*				*Capital*				*Deficit*				*Income*				*Equity*
Balances at March 31, 2019			80,941,524			$	8,094			$	220,222,959			$	(114,161,484	)		$	—			$	106,069,569
Net loss			—				—				—				(3,162,492	)			—				(3,162,492	)
Issuance of common stock upon vesting of RSUs			105,000				11				(11	)			—				—				—
Stock-based compensation			—				—				547,390				—				—				547,390
Balances at June 30, 2019		$	81,046,524			$	8,105			$	220,770,338			$	(117,323,976	)		$	—			$	103,454,467

		*Common Stock*								*Additional Paid-in*				*Accumulated*				*Other Comprehensive*				*Total Stockholders'*
		*Shares*				*Amount*				*Capital*				*Deficit*				*Income*				*Deficiency*
Balances at December 31, 2018			80,763,350			$	8,076			$	218,697,872			$	(115,791,261	)		$	—			$	102,914,687
Net loss			—				—				—				(1,532,715	)			—				(1,532,715	)
Issuance of common stock upon exercise of stock options			9,769				1				(1	)			—				—				—
Issuance of common stock upon vesting of RSUs and exercise of stock-settled appreciation rights			121,771				13				(13	)			—				—				—
Issuance of common stock upon exercise of warrants			159,782				16				1,172,785				—				—				1,172,801
Payment of common stock tendered for employee stock-based compensation tax obligations			(8,148	)			(1	)			(56,589	)			—				—				(56,590	)
Stock-based compensation			—				—				956,284				—				—				956,284
Balances at June 30, 2019			81,046,524			$	8,105			$	220,770,338			$	(117,323,976	)		$	—			$	103,454,467

On March 5, 2020, the Company announced that the board of directors had authorized a share repurchase program under which the Company may repurchase, from time to time, up to an aggregate of $50 million of the Company's common stock through December 31, 2021. The timing and actual number of shares repurchased will depend on a variety of factors, including: exercise of procurement options under government contracts; alternative opportunities for strategic uses of cash; the stock price of the Company’s common stock; market conditions; and other corporate liquidity requirements and priorities. Repurchases under the program may be made from time to time at the Company’s discretion in open market transactions, through block trades, in privately negotiated transactions, and pursuant to any trading plan that may be adopted by the Company’s management in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended, or otherwise. During the three and six months ended June 30, 2020, the Company repurchased 2.5 million, and 2.8 million shares of common stock, respectively, for approximately $15.2 million, and $16.2 million, respectively.