This describes the NASDAQ delisting process. I don't believe shareholders will have much to worry about. There's plenty of buffer built into the process.

Failure of a company to meet a minimum closing bid price of at least $1 for 30 consecutive trading days can trigger delisting. When this happens Nasdaq issues a deficiency notice to the company.

After receiving a deficiency notice, a company has 180 calendar days to return to compliance. A company warned about its shares' minimum bid price must achieve a closing price of $1 or more for 10 consecutive trading days during this period.

http://finance.zacks.com/nasdaq-delisting-rules-7450.html