Note 11 - Concentrations - Revenues by Product Platform (Details) - USD ($)	6 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2018	Jun. 30, 2017
Net revenues	$ 6,013,000	$ 9,672,000	$ 14,525,000
Product Concentration Risk [Member] | AXP [Member]
Net revenues	2,475,000	4,393,000	8,715,000
Product Concentration Risk [Member] | BioArchive [Member]
Net revenues	2,642,000	3,098,000	3,318,000
Product Concentration Risk [Member] | Manual Disposables [Member]
Net revenues	476,000	976,000	1,195,000
Product Concentration Risk [Member] | CAR-TXpress [Member]
Net revenues	151,000	907,000
Product Concentration Risk [Member] | Bone Marrow [Member]
Net revenues	180,000	135,000	745,000
Product Concentration Risk [Member] | Product and Service, Other [Member]
Net revenues	$ 89,000	$ 163,000	$ 552,000