Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		12 Months Ended	34 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2014	Sep. 30, 2015	Jun. 30, 2015
Reclassification of Short-term Investment to Cash Equivalents, Decrease in Short-term Investments [Member]
Prior Period Reclassification Adjustment		$ (12,100,000)	$ (20,200,000)
Reclassification of Short-term Investment to Cash Equivalents, Increase in Cash Equivalents [Member]
Prior Period Reclassification Adjustment		12,100,000	20,200,000
MicroCutter XCHANGE 30 [Member]
Revenue, Net	$ 200,000			$ 1,600,000
Automated Anastomotic Systems [Member]
Revenue, Net	600,000
Scenario, Previously Reported [Member]
Short-term Investments			20,200,000
Money Market Funds [Member]
Reclassification of Short-term Investment to Cash Equivalents			(17,700,000)
Corporate Debt Securities1 [Member]
Reclassification of Short-term Investment to Cash Equivalents			(1,000,000)
Commercial Paper [Member]
Reclassification of Short-term Investment to Cash Equivalents			1,500,000
Revenue, Net	755,000	1,068,000
Royalty Revenue	18,000	17,000
Short-term Investments	$ 11,444,000			$ 11,444,000	$ 12,972,000
Reclassification of Short-term Investment to Cash Equivalents			20,200,000
Increase in Net Cash Used in Investing Activities, Attributable to Reclassification from Short-term Investments to Cash Equivalents		$ 8,100,000
Decrease in Net Cash Used in Investing Activities, Attributable to Reclassification from Short-term Investments to Cash Equivalents			$ 20,200,000