It´s since 1971 public and was a nasdaq stock which traded very high and very difficult to accumulate a good position.
There were 2 strange trades last year, but there was never a bid or ask which fit to these trades. I watched it very close and it was never possible to get a reasonable position in one day.
CMRO 14.11.2017 0,0250 0,0260 0,0250 0,0260 567.670
CMRO 10.11.2017 0,0250 0,0250 0,0250 0,0250 200.000