BOSTON ( TheStreet) -- Small-cap stocks are typically high-beta and high-risk. But here are 10 top-ranked small-cap companies that carry more cash than debt on their balance sheets. Excess liquidity ensures that these companies can survive in any economic environment. They rank in the top percentile for expected risk-adjusted return in TheStreet's 5,000+ stock coverage universe. Below, they are ordered by net cash, from plenty to too much.