Stock-Based Compensation -Non-Vested Outstanding Stock Options (Details) shares in Thousands	12 Months Ended
	Jan. 30, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares
Beginning balance, Non-vested (in shares) | shares	2,035
Granted (in shares) | shares	1,510
Vested (in shares) | shares	(1,177)
Cancelled (in shares) | shares	(1,008)
Ending balance, Non-vested (in shares) | shares	1,360
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value
Beginning balance, Non-vested, Weighted Average Grant-Date Fair Value (usd per share) | $ / shares	$ 1.52
Granted, Weighted Average Grant-Date Fair Value (usd per share) | $ / shares	1.61
Vested, Weighted Average Grant-Date Fair Value (usd per share) | $ / shares	1.57
Cancelled, Weighted Average Grant-Date Fair Value (usd per share) | $ / shares	1.55
Ending balance, Non-vested, Weighted Average Grant-Date Fair Value (usd per share) | $ / shares	$ 1.57