7. Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Assumptions for stock options

	Year Ended December 31,
	2016		2015		2014
Expected life (years)		4.04		4.21		4.22
Risk-free interest rate		1.09%		1.35%		1.43%
Volatility		51%		51%		55%
Expected dividend yield		–		–		–

Option activity

						Weighted
	Number of			Weighted		Average
	Shares			Average		Remaining
	(in thousands)			Exercise Price		Contractual Term
Options outstanding at the beginning of period		11,228		$	4.66	N/A
Granted		2,105			3.53	N/A
Exercised		(448	)		1.41	N/A
Forfeited/Expired		(290	)		5.93	N/A
Options outstanding at the end of period		12,595		$	4.56	5.02 years
Options exercisable at the end of period		7,396		$	4.03	4.51 years