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Note 23 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Restricted Stock Unit Activity

		Number of Restricted Stock Units				Weighted-Average Grant Date Fair Values
Outstanding on December 31, 2018			703,748			$	4.72
Granted			521,698			$	2.93
Vested			475,295			$	4.92
Forfeited			28,350			$	5.88
Outstanding on December 31, 2019			721,801			$	3.25

Stock Option Activity

		Shares Under Option				Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Life (Years)		Aggregate Intrinsic Value ($ millions)
Outstanding on December 31, 2018			5,195,937			$	13.85
Granted			2,220,959			$	4.60
Forfeited			573,817			$	12.50
Outstanding on December 31, 2019			6,843,079			$	10.96			4.07		$	2
Exercisable on December 31, 2019			6,050,372			$	11.18			3.95		$	2
Expected to vest December 31, 2019			792,707			$	9.27			5.86		$	—

Share-based Payment Award, Stock Options, Valuation Assumptions

		Year Ended December 31,
		2019				2018
Weighted-average fair value of options granted		$	1.73			$	2.45
Weighted-average risk-free interest rate		2.47%				2.70%
Range of risk-free interest rates		2.28% - 2.54%				2.59% - 2.95%
Weighted-average expected option lives		4.5 years				4.5 years
Expected option lives		4.5 years				4.4 - 4.5 years
Weighted-average volatility		90%				81%
Range of expected volatilities		81% - 90%				80% - 83%
Weighted-average expected dividend yield		0.00%				0.00%

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year.

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