Note 3 - Fair Value of Financial Instruments (Details Textual)	3 Months Ended
Mar. 31, 2020
Fair Value, Inputs, Level 2 [Member]
Average Remaining Maturity of Investment (Year)	36 days

Average remaining period until maturity of investment.

No definition available.

Name:	cutr_AverageRemainingMaturityOfInvestment
Namespace Prefix:	cutr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration