Note 14 - Consolidated Balance Sheet Detail - Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Accrued expenses and other current liabilities	$ 302			$ 62
Other payables	1,018
Accrued compensation	1,554			998
Deferred revenue	324
Deferred rent, current portion		$ 1,079	$ 1,196	130
Other	171			29
Total accrued expenses and other current liabilities	$ 3,369			$ 1,219