An explorer with reserves likely to begin mining in 3 or more likely 4 or 5 years is subject to concern about the gold price holding up for, say, the next 10 years so that at least 5 years of production is nicely priced for profit. That's a long time. The reason why explorers are the last to explode upward in a secular bull is precisely for this reason - as the price continues to march forward, investors become more and more comfortable with nosebleed gold prices, and can imagine the explorers to approach production very profitably. We are seeing the very beginning of this confidence now with Tyhee IMO.
OK, so you ask why is Tyhee valued less than comparable explorers? I believe the main reason is that most every one is in play for a buyout by a producer, which effectively shifts the risk of lower future gold prices to the acquirers, and therefore adding present value to the explorers. But Tyhee is not in that camp, so while it may reap greater future rewards, it bears greater risk which weighs heavily on current stock pricing.
You may not want your spouse to flirt, but there is a lot to say for your promising explorer to do so.
Strike