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Stock-Based Compensation (Details) $ / shares in Units, $ in Millions		3 Months Ended
	Feb. 02, 2018 shares	Sep. 30, 2018 USD ($) Vesting_Installlment $ / shares shares	Sep. 30, 2017 USD ($)	Nov. 21, 2006 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock based compensation reflected in additional paid in capital | $		$ 0.6	$ 0.4
Increase in share-based compensation included in other accrued expenses | $		$ 0.7	$ 0.2
2007 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)				1,429,000
Right to purchase common stock, minimum price per share (USD per share) | $ / shares		$ 1.47
Right to purchase common stock, maximum price per share (USD per share) | $ / shares		$ 10.5
Contractual term of stock options granted		10 years
2007 Long-Term Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award, vesting period		1 year
2007 Long-Term Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award, vesting period		3 years
2010 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	475,000	1,065,000
Right to purchase common stock, minimum price per share (USD per share) | $ / shares		$ 5.60
Right to purchase common stock, maximum price per share (USD per share) | $ / shares		$ 20.09
Contractual term of stock options granted		10 years
2010 Long-Term Incentive Plan | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award, vesting period		1 year
2010 Long-Term Incentive Plan | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award, vesting period		4 years
2016 Performance Incentive Plan | Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award, vesting period		3 years
Number of vesting installments | Vesting_Installlment		3
2017 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	1,550,000	1,500,000
Share based payment award, vesting period		3 years
Number of additional shares authorized (in shares)	425,000
Right to purchase common stock, non-vested and outstanding, exercise price (USD per share) | $ / shares		$ 4.44
Options outstanding, net of awards expired (in shares)		500,000
2017 Long-Term Incentive Plan Excluding 2010 Long-Term Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares)	1,075,000

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