Note 15 - Government Grants (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Government Grants [Abstract]
Financial Grants in Support of Research and Development	$ 0.6	$ 0.1
Financial Grants in Support of Research and Development Royalty Obligation	5.00%

Royalty obligation that must be paid on sales of certain products the development of which received grants in previous years. Expressed as a percentage of sales.

No definition available.

Name:	dspg_FinancialGrantsInSupportOfResearchAndDevelopmentRoyaltyObligation
Namespace Prefix:	dspg_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant