Share-Based Compensation - Stock Option Activity (Details) $ / shares in Units, $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 14, 2018 USD ($) $ / shares shares	Aug. 30, 2017 USD ($) $ / shares shares
Shares Under Fixed Options
Beginning balance (in shares) | shares	1,345,916
Granted (in shares) | shares	449,410
Expired (in shares) | shares	(44,801)
Forfeited (in shares) | shares	(67,673)
Ending balance (in shares) | shares	1,682,852	1,345,916
Exercisable (in shares) | shares	1,095,541
Weighted- Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 4.64
Granted (in dollars per share) | $ / shares	2.82
Expired (in dollars per share) | $ / shares	7.89
Forfeited (in dollars per share) | $ / shares	3.68
Ending balance (in dollars per share) | $ / shares	4.11	$ 4.64
Exercisable, Weighted-average exercise price (in dollars per share) | $ / shares	$ 4.54
Additional Information
Weighted-average remaining contractual term	6 years 11 months 22 days	6 years 4 months 24 days
Exercisable, Weighted-average remaining contractual term	5 years 8 months 19 days
Aggregate intrinsic value | $	$ 50	$ 0
Exercisable, Aggregate intrinsic value | $	$ 0