Related Party Transactions - Narrative (Details)													1 Months Ended		12 Months Ended		27 Months Ended
	Nov. 02, 2015 USD ($)	Oct. 30, 2015 USD ($) shares	Oct. 28, 2015	Aug. 06, 2015 USD ($)	Aug. 04, 2015 USD ($) shares	Jul. 31, 2015	May. 13, 2015 USD ($) shares	May. 07, 2015	Apr. 29, 2015	Feb. 19, 2015 USD ($)	Jan. 22, 2015 shares	Nov. 14, 2014	Dec. 17, 2014 USD ($) shares	Feb. 28, 2013	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 USD ($)
Related Party Transaction [Line Items]
Repurchase of common stock		$ 5,000,000			$ 5,000,000		$ 5,000,000						$ 4,500,000		$ 16,071,000	$ 4,661,000
Repurchase of common stock (in shares) | shares		106,264			162,442		186,519						359,840
Director
Related Party Transaction [Line Items]
Treasury stock acquired rate			0.4066			0.4085		0.4286
Repurchase of common stock	$ 1,400,000			$ 1,500,000			$ 1,500,000			$ 1,100,000			$ 1,500,000
Repurchase of common stock (in shares) | shares											91,817		119,947
Shares repurchased per trading day | shares											5,000
Director | George Broady
Related Party Transaction [Line Items]
Treasury stock acquired rate												0.50
Broady Health Sciences
Related Party Transaction [Line Items]
Royalty rate														2.50%
Termination notice, number of days														120 days
Accrued royalties during the period															555,000	144,000	$ 144,000
Soothe | Broady Health Sciences
Related Party Transaction [Line Items]
Royalty rate									2.50%
Royalty expense															$ 7,000	$ 6,400	$ 11,700
Termination notice, number of days									120 days