Annual report pursuant to Section 13 and 15(d)

Note C - Summary of Significant Accounting Policies (Details Textual)

v3.19.1
Note C - Summary of Significant Accounting Policies (Details Textual)
1 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2018
USD ($)
shares
Dec. 31, 2017
USD ($)
shares
Number of Operating Segments   2  
Allowance for Doubtful Accounts Receivable, Ending Balance   $ 10,000 $ 10,000
Inventory Valuation Reserves, Ending Balance   $ 763,000 $ 220,000
Options and Warrants [Member]      
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares   3,203,553 3,710,335
Minimum [Member]      
Property, Plant and Equipment, Useful Life   2 years  
Maximum [Member]      
Property, Plant and Equipment, Useful Life   7 years  
Milestone Education LLC [Member]      
Additional Interest In Subsidiaries Acquired During Period, Percentage. 50.00%