Goodwill, Trademarks, and Other Intangible Assets (Details) (USD $)	6 Months Ended
	Jun. 30, 2013 item
Goodwill, Trademarks, and Other Intangible Assets
Number of events occurred subsequent to annual impairment test indicating impairment	0
Goodwill:
Balance at the beginning of the period	$ 22,916,000
Foreign currency translation impact	(189,000)
Balance at the end of the period	22,727,000
Band
Goodwill:
Goodwill, cumulative impairment loss	8,800,000
Online music business
Goodwill:
Goodwill, cumulative impairment loss	2,700,000
Piano Segment
Goodwill:
Balance at the beginning of the period	22,916,000
Foreign currency translation impact	(189,000)
Balance at the end of the period	$ 22,727,000