COMMITMENTS AND CONTINGENCIES (Details 3) (Michael Pierce, Patrick Gould, individually and on behalf of all others similarly situated v. Rosetta Stone Ltd and DOES 1 to 50, Damages, injunctive relief and restitution, USD $) In Millions, unless otherwise specified	1 Months Ended
	Sep. 30, 2013	Sep. 30, 2011 Lawsuit filed
Litigation
Reserve for proposed settlement amount		$ 0.6
Final settlement amount	$ 0.6