Stock-Based Compensation and Expense (Details 4) shares in Thousands	Dec. 31, 2015 $ / shares shares
Securities authorized for issuance under equity compensation plans
Number of securities to be issued upon exercise of outstanding options and rights	2,882
Weighted average exercise price of outstanding options and rights | $ / shares	$ 1.93
Number of securities remaining available for future issuance under equity incentive plan	1,710
Equity Compensation Plans Approved by Security Holders
Securities authorized for issuance under equity compensation plans
Number of securities to be issued upon exercise of outstanding options and rights	2,882
Weighted average exercise price of outstanding options and rights | $ / shares	$ 1.93
Number of securities remaining available for future issuance under equity incentive plan	1,710