Note 2 - Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives for Each Asset Group (Details)	12 Months Ended
	Dec. 31, 2018
Minimum [Member] | Building and Building Improvements [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	20 years
Minimum [Member] | Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	7 years
Minimum [Member] | Furniture and Fixtures [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	5 years
Minimum [Member] | Computer Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	3 years
Maximum [Member] | Building and Building Improvements [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	30 years
Maximum [Member] | Machinery and Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	15 years
Maximum [Member] | Furniture and Fixtures [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	7 years
Maximum [Member] | Computer Equipment [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives (Year)	7 years