| Schedule of allocation of sale price | Proceeds were allocated to the components of the sale based upon
their relative selling prices are as follows:   
    | Customer base |  | $ | 850,000 |  |  
    | Less: Funds remaining in escrow |  |  | (60,000 | ) |  
    | Less: Services due from buyer |  |  | (100,000 | ) |  
    | Less: Working capital adjustment |  |  | (80,000 | ) |  
    | Total proceeds |  | $ | 610,000 |  |  | 
| Assets and liabilities of disposal group | The carrying value of the assets and liabilities
of discontinued operations on the condensed consolidated balance sheets as of December 31, 2020 and March 31, 2020 were as follows:   
    |  |  | December 31, 2020 |  |  | March 31, 2020 |  |  
    | Assets |  |  |  |  |  |  |  |  |  
    | Accounts receivable (net) |  | $ | – |  |  | $ | 89,000 |  |  
    | Inventory |  |  | – |  |  |  | 11,000 |  |  
    | Operating lease, right of use |  |  | – |  |  |  | 604,000 |  |  
    | Total current assets of discontinued operations |  | $ | – |  |  | $ | 704,000 |  |  
    |  |  |  |  |  |  |  |  |  |  
    | Liabilities |  |  |  |  |  |  |  |  |  
    | Accounts payable |  | $ | – |  |  | $ | 18,000 |  |  
    | Operating lease |  |  | – |  |  |  | 117,000 |  |  
    | Total current liabilities of discontinued operations |  | $ | – |  |  | $ | 135,000 |  |  
    |  |  |  |  |  |  |  |  |  |  
    | Operating lease |  | $ | – |  |  | $ | 511,000 |  |  
    | Total Long-term liabilities of discontinued operations |  | $ | – |  |  | $ | 511,000 |  |    The operations of the Micromed business included in discontinued
operations is summarized as follows:   
    |  |  | Three Months Ended December 31, |  |  | Nine Months Ended December 31, |  |  
    |  |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |  |  
    | Revenues |  | $ | – |  |  | $ | 283,000 |  |  | $ | 214,000 |  |  | $ | 741,000 |  |  
    | Cost of revenues |  |  | – |  |  |  | 126,000 |  |  |  | 53,000 |  |  |  | 391,000 |  |  
    | Selling general and administrative expenses |  |  | (1,000 | ) |  |  | 31,000 |  |  |  | 38,000 |  |  |  | 98,000 |  |  
    | Income (loss) from discontinued operations before tax |  |  | 1,000 |  |  |  | 126,000 |  |  |  | 123,000 |  |  |  | 252,000 |  |  
    | Gain (loss) on disposal of discontinued operations before income taxes |  |  | (25,000 | ) |  |  | – |  |  |  | 770,000 |  |  |  | – |  |  
    | Total income (loss) from discontinued operations, before tax |  |  | (24,000 | ) |  |  | 126,000 |  |  |  | 893,000 |  |  |  | 252,000 |  |  
    | Income Tax benefit (expense) |  |  | – |  |  |  | – |  |  |  | – |  |  |  | – |  |  
    | Income (loss) from discontinued operations, net of tax |  | $ | (24,000 | ) |  | $ | 126,000 |  |  | $ | 893,000 |  |  | $ | 252,000 |  |  |