10-Q:
"Due to several revenue earning robots becoming non-operational during the nine months ended November 30, 2017, the Company wrote down revenue earning robots with a net book value of $82,855 to $0 as loss on impairment of fixed assets."
"Due to several demo robots becoming non-operational during the nine months ended November 30, 2017, the Company wrote down fixed assets with a net book value of $42,409 to $0 as loss on impairment of fixed assets."
I think concern about the cost of maintenance and replacement of these robots is warranted.
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