Note 13 - Related Party Transactions (Details Textual) - Interlink Electronics, Inc. [Member] - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Due from Related Parties	$ 1,000		$ 1,000		$ 1,000
Due to Related Parties	0		0		$ 2,000
Administrative Services Provided to Related Party [Member]
Related Party Transaction, Amounts of Transaction	3,000	$ 9,000	5,000	$ 20,000
Reimbursement of Expenses Paid By Related Party [Member]
Related Party Transaction, Amounts of Transaction	$ 1,000	$ 5,000	$ 7,000	$ 7,000