Note 6 - Leases and Other Commitments and Contingencies - Minimum Rental Commitment for Long-term Non-cancelable Leases (Details) $ in Thousands	Mar. 31, 2019 USD ($)
2019, remaining, Capital Lease Obligation	$ 65
2019, remaining, Total	219
2020, Capital Lease Obligation	206
2020, Total	810
2021, Capital Lease Obligation	77
2021, Total	664
2022, Capital Lease Obligation
2022, Total	574
2023, Capital Lease Obligation
2023, Total	565
2024, Capital Lease Obligation
2024, Total	563
Thereafter, Capital Lease Obligation
Thereafter, Total	845
Total minimum lease payments, Capital Lease Obligation	348
Total minimum lease payments, Total	4,240
Imputed interest, Capital Lease Obligation	(20)
Imputed interest, Total	(480)
Total, Capital Lease Obligation	328
Total	3,760
Vitamin Realty LLC [Member]
2019, remaining, Operating Lease	142
2020, Operating Lease	565
2021, Operating Lease	565
2022, Operating Lease	565
2023, Operating Lease	565
2024, Operating Lease	563
Thereafter, Operating Lease	845
Total minimum lease payments, Operating Lease	3,810
Imputed interest, Operating Lease	(457)
Total, Operating Lease	3,353
Unrelated Party [Member]
2019, remaining, Operating Lease	12
2020, Operating Lease	39
2021, Operating Lease	22
2022, Operating Lease	9
2023, Operating Lease
2024, Operating Lease
Thereafter, Operating Lease
Total minimum lease payments, Operating Lease	82
Imputed interest, Operating Lease	(3)
Total, Operating Lease	$ 79