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Consolidated Balance Sheets (Parentheticals) - USD ($)
Mar. 31, 2018
Mar. 31, 2017
Cash and cash equivalents $ 4,803,238 $ 2,763,365
Allowance for doubtful accounts 801,000 979,000
Accounts receivable [1] 15,157,855 18,923,787
Inventories, net 34,231,005 19,778,843
Prepaid expenses and other 1,455,566 1,672,475
Property and equipment, net 20,273,171 5,324,488
Accounts payable 10,181,143 11,571,156
Income tax payable 23,000
Accrued expenses 11,743,973 8,672,815
Long-term debt $ 38,855,260 $ 18,412,521
Preferred stock, par value (in dollars per share) $ 1 $ 1
Preferred stock, shares authorized (in shares) 50,000 50,000
Common stock, par value (in dollars per share) $ 0.25 $ 0.25
Common stock, shares authorized (in shares) 4,000,000 4,000,000
Common stock, shares issued (in shares) 2,043,607 2,042,789
Common stock, shares outstanding (in shares) 2,043,607 2,042,789
Delphax [Member]    
Cash and cash equivalents [2] $ 241,430 $ 328,327
Accounts receivable 317,000 1,728,411
Inventories, net [2] 0 1,941,729
Prepaid expenses and other [2] 72,269 932,794
Property and equipment, net [2] 0 8,007
Accounts payable [2] 2,145,847 2,482,578
Income tax payable [2] 11,312 11,312
Accrued expenses [2] 3,244,514 3,602,162
Long-term debt [2] $ 0 $ 0
[1] Amounts related to Delphax as of March 31, 2018 and 2017, respectively.
[2] Amounts related to Delphax as of March 31, 2018 and 2017, respectively.