Note 10 - Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Jul. 31, 2019 USD ($)
For the six months ended January 31, 2020, operating leases	$ 1,140
For the six months ended January 31, 2020, finance leases	120
For the year ended January 31, 2021, operating leases	2,179
For the year ended January 31, 2021, finance leases	240
For the year ended January 31, 2022, operating leases	2,066
For the year ended January 31, 2022, finance leases	83
For the year ended January 31, 2023, operating leases	2,008
For the year ended January 31, 2023, finance leases	21
For the year ended January 31, 2024, operating leases	1,829
For the year ended January 31, 2024, finance leases
For the year ended January 31, 2025, operating leases	1,160
For the year ended January 31, 2025, finance leases
Thereafter, operating leases	6,656
Thereafter, finance leases
Total lease payments, operating leases	17,038
Total lease payments, finance leases	464
Less: amount representing interest, operating leases	(5,536)
Less: amount representing interest, finance leases	(32)
Total lease liabilities, operating leases	11,502
Total lease liabilities, finance leases	$ 432