That translates to $0.82 - $0.1.04 over 1 billion shares.
During these years, company's revenue increased by 10 times (??) to $180 million (May be more than 10 times) The company has been far more profitable, with a lot more possibilities in pipeline.
This should translate into SP increase by 150% JMHO. This translates to a mean value of about $2.30 Add some 30% premium keeping in view all future possibilities (it ought to be more). This ought to bring the valuation to about $3.00 on the conservative side JMHO
Please note that this is purely hypothetical calculation. Just some logical guessing of numbers.