Note 12 - Equipment Leased to Customers - Annual Lease Payments Receivable (Details)	Mar. 31, 2016 USD ($)
Equipment [Member]
2017	$ 206,000
2018	46,040
2019	46,040
2020	46,040
2021	46,040
Thereafter	3,837
Total minimum lease payments	393,994
Printer [Member]
2017	240,000
2018	240,000
2019	40,000
Total minimum lease payments	$ 520,000