Note 7 - Intangible Assets, Net - Schedule of Finite-lived Intangible Assets (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2020		Dec. 31, 2019		Mar. 31, 2018
Total intangible assets, Gross Carrying Amount		$ 21,250		$ 21,250
Total intangible assets, Accumulated Amortization		9,124		7,826
Intangible assets, net		$ 12,126		13,424
Customer Relationships [Member] | RivieraWaves [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		4 years 6 months
Total intangible assets, Gross Carrying Amount		$ 272		272
Total intangible assets, Accumulated Amortization		272		272
Intangible assets, net		$ 0		0
Customer Relationships [Member] | Acquisition of Hillcrest Labs [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		4 years 4 months 24 days
Total intangible assets, Gross Carrying Amount		$ 3,518		3,518
Total intangible assets, Accumulated Amortization		829		395
Intangible assets, net		$ 2,689		3,123
Customer Backlog [Member] | RivieraWaves [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		1 year 6 months
Total intangible assets, Gross Carrying Amount		$ 93		93
Total intangible assets, Accumulated Amortization		93		93
Intangible assets, net		$ 0		0
Customer Backlog [Member] | Acquisition of Hillcrest Labs [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		6 months
Total intangible assets, Gross Carrying Amount		$ 72		72
Total intangible assets, Accumulated Amortization		72		65
Intangible assets, net		$ 0		7
Core Technologies [Member] | Immervision [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		6 years 4 months 24 days
Total intangible assets, Gross Carrying Amount		$ 7,063		7,063
Total intangible assets, Accumulated Amortization		1,023		472
Intangible assets, net		$ 6,040		6,591
Core Technologies [Member] | RivieraWaves [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		5 years 1 month 6 days
Total intangible assets, Gross Carrying Amount		$ 5,796		5,796
Total intangible assets, Accumulated Amortization		5,796		5,796
Intangible assets, net		$ 0		0
Core Technologies [Member] | Acquisition of Hillcrest Labs [Member]
Total intangible assets, Weighted Average Amortization Period (Year)		7 years 6 months
Total intangible assets, Gross Carrying Amount		$ 2,475		2,475
Total intangible assets, Accumulated Amortization		315		150
Intangible assets, net		$ 2,160		2,325
NB-IoT technologies [Member]
Total intangible assets, Weighted Average Amortization Period (Year)	[1]	7 years
Total intangible assets, Gross Carrying Amount		$ 1,961	[1]	1,961	[1]	$ 2,200
Total intangible assets, Accumulated Amortization	[1]	724		583
Intangible assets, net	[1]	$ 1,237		$ 1,378

[1] During the first quarter of 2018, the Company entered into an agreement to invest in certain NB-IoT technologies in the amount of $2,800, of which, technologies valued at $600 has not been received. Of the $2,200, $210 has not resulted in cash outflows as of June 30, 2020. In addition, the Company participated in programs sponsored by the Hong Kong government for the support of the above investment, and as a result, the Company received during 2019 an amount of $239 related to the NB-IoT technologies, which was reduced from the gross carrying amount of intangible assets. The Company recorded the amortization cost of the NB-IoT technologies in "cost of revenues" on the Company's interim condensed consolidated statements of income (loss).