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Note 7 - Goodwill and Intangible Assets, Net (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets, Gross, Total   $ 21,250 $ 8,361  
Intangible Assets Expenditures Incurred but Not yet Paid   750
Amortization of Intangible Assets, Total   1,923 901 $ 1,236
Amortization of Intangible Assets, Including Portion in Cost of Revenues   2,165 1,242  
NB-IoT technologies [Member]        
Finite-lived Intangible Assets Acquired $ 2,800      
Finite Lived Intangible Assets Acquired, Balance Not Received $ 600      
Finite-Lived Intangible Assets, Gross, Total [1]   1,961 $ 2,200  
Intangible Assets Expenditures Incurred but Not yet Paid   210    
Amortization of Intangible Assets, Total   $ 239    
[1] During the first quarter of 2018, the Company entered into an agreement to acquire 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 December 31, 2019. In addition, the Company participated in programs sponsored by the Hong Kong government for the support of the above acquisition, 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).