Quarterly report pursuant to Section 13 or 15(d)

Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual)

v2.4.1.9
Note 1 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Jun. 30, 2014
Available-for-sale Securities, Amortized Cost Basis $ 35.0us-gaap_AvailableForSaleSecuritiesAmortizedCost $ 40.7us-gaap_AvailableForSaleSecuritiesAmortizedCost
Available-for-sale Securities 53.5us-gaap_AvailableForSaleSecurities 48.4us-gaap_AvailableForSaleSecurities
Inventory Valuation Reserves 24.0us-gaap_InventoryValuationReserves 30.0us-gaap_InventoryValuationReserves
Chemo Centryx, Inc. [Member]    
Available-for-sale Securities, Amortized Cost Basis 29.5us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= tech_ChemoCentryxIncMember 		29.5us-gaap_AvailableForSaleSecuritiesAmortizedCost
/ us-gaap_InvestmentTypeAxis
= tech_ChemoCentryxIncMember
Available-for-sale Securities $ 48.0us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= tech_ChemoCentryxIncMember 		$ 37.1us-gaap_AvailableForSaleSecurities
/ us-gaap_InvestmentTypeAxis
= tech_ChemoCentryxIncMember