Note O - Government Grants (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Financial Grants in Support of Research and Development	$ 0.8	$ 1.0	$ 0.9	$ 1.6
Financial Grants in Support of Research and Development, Royalty Obligation	5.00%		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